diff --git a/src/gnome-utils/dialog-account.c b/src/gnome-utils/dialog-account.c
index 4d9c86cbd5..abd9310187 100644
--- a/src/gnome-utils/dialog-account.c
+++ b/src/gnome-utils/dialog-account.c
@@ -668,7 +668,6 @@ verify_children_compatible (AccountWindow *aw)
     gtk_label_set_selectable (GTK_LABEL (label), TRUE);
     gnc_label_set_alignment (label, 0.0, 0.0);
     {
-#if GTK_CHECK_VERSION(3,16,0)
         GtkCssProvider *provider = gtk_css_provider_new();
         const gchar *label_css = {
                                   "label {\n"
@@ -681,21 +680,6 @@ verify_children_compatible (AccountWindow *aw)
                                    GTK_STYLE_PROVIDER (provider),
                                    GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
         g_object_unref (provider);
-#else
-        gint size;
-        PangoFontDescription *font_desc;
-        GtkStyleContext *style;
-
-        style = gtk_widget_get_style_context(label);
-        gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL, GTK_STYLE_PROPERTY_FONT, &font_desc, NULL);
-
-        size = pango_font_description_get_size (font_desc);
-        font_desc = pango_font_description_new ();
-        pango_font_description_set_weight (font_desc, PANGO_WEIGHT_BOLD);
-        pango_font_description_set_size (font_desc, size * PANGO_SCALE_LARGE);
-        gtk_widget_override_font(label, font_desc);
-        pango_font_description_free (font_desc);
-#endif
     }
     gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
 
diff --git a/src/gnome-utils/gnc-cell-renderer-popup-entry.c b/src/gnome-utils/gnc-cell-renderer-popup-entry.c
index c704176bee..e1e0da57fd 100644
--- a/src/gnome-utils/gnc-cell-renderer-popup-entry.c
+++ b/src/gnome-utils/gnc-cell-renderer-popup-entry.c
@@ -108,11 +108,7 @@ gnc_popup_entry_init (GncPopupEntry *widget)
     widget->button = gtk_button_new ();
     gtk_widget_show (widget->button);
 
-#if GTK_CHECK_VERSION(3,14,0)
     arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
-#endif
     gtk_widget_show (arrow);
 
     gtk_container_add (GTK_CONTAINER (widget->button), arrow);
@@ -302,12 +298,9 @@ gnc_popup_get_button_width (void)
     gtk_widget_show (button);
     gtk_container_add (GTK_CONTAINER (window), button);
 
-#if GTK_CHECK_VERSION(3,14,0)
     arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
-#endif
     gtk_widget_show (arrow);
+
     gtk_container_add (GTK_CONTAINER (button), arrow);
 
     gtk_window_move (GTK_WINDOW (window), -500, -500);
diff --git a/src/gnome-utils/gnc-combott.c b/src/gnome-utils/gnc-combott.c
index 33b6f18017..d10c080f7c 100644
--- a/src/gnome-utils/gnc-combott.c
+++ b/src/gnome-utils/gnc-combott.c
@@ -227,11 +227,8 @@ gctt_init (GncCombott *combott)
     hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
     gtk_box_set_homogeneous (GTK_BOX(hbox), FALSE);
 
-#if GTK_CHECK_VERSION(3,14,0)
     arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
-#endif
+
 #if GTK_CHECK_VERSION(3,12,0)
     gtk_widget_set_margin_start (GTK_WIDGET(arrow), 5);
 #else
diff --git a/src/gnome-utils/gnc-date-edit.c b/src/gnome-utils/gnc-date-edit.c
index dfe32e0564..47f3a22c28 100644
--- a/src/gnome-utils/gnc-date-edit.c
+++ b/src/gnome-utils/gnc-date-edit.c
@@ -928,11 +928,8 @@ create_children (GNCDateEdit *gde)
         gtk_widget_show (GTK_WIDGET(gde->cal_label));
 
     /* Graphic for the popup button. */
-#if GTK_CHECK_VERSION(3,14,0)
     arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
-#endif
+
     gtk_box_pack_start (GTK_BOX (hbox), arrow, TRUE, FALSE, 0);
     gtk_widget_show (GTK_WIDGET(arrow));
 
diff --git a/src/gnome-utils/gnc-dense-cal.c b/src/gnome-utils/gnc-dense-cal.c
index 1415af171c..07f86f1a4b 100644
--- a/src/gnome-utils/gnc-dense-cal.c
+++ b/src/gnome-utils/gnc-dense-cal.c
@@ -378,7 +378,6 @@ gnc_dense_cal_init(GncDenseCal *dcal)
                                GTK_STYLE_PROPERTY_FONT, &font_desc, NULL);
         font_size = pango_font_description_get_size(font_desc);
 
-#if GTK_CHECK_VERSION(3,16,0)
         provider = gtk_css_provider_new();
         dpi = gdk_screen_get_resolution (gdk_screen_get_default ());
         px_size = ((font_size / PANGO_SCALE) - font_size_reduction_units) * (dpi / 72.);
@@ -391,11 +390,7 @@ gnc_dense_cal_init(GncDenseCal *dcal)
         g_object_unref (provider);
         g_free (px_str);
         g_free (widget_css);
-#else
-        font_size -= font_size_reduction_units * PANGO_SCALE;
-        pango_font_description_set_size(font_desc, font_size);
-        gtk_widget_override_font(GTK_WIDGET(dcal), font_desc);
-#endif
+
         pango_font_description_free (font_desc);
 
         maxWidth = maxHeight = 0;
diff --git a/src/gnome-utils/gnc-main-window.c b/src/gnome-utils/gnc-main-window.c
index ce7d5f7f62..fbde441130 100644
--- a/src/gnome-utils/gnc-main-window.c
+++ b/src/gnome-utils/gnc-main-window.c
@@ -2301,11 +2301,10 @@ main_window_update_page_color (GncPluginPage *page,
 
     if (want_color && gdk_rgba_parse(&tab_color, color_string) && priv->show_color_tabs)
     {
-#if GTK_CHECK_VERSION(3,16,0)
         GtkCssProvider *provider = gtk_css_provider_new();
         GtkStyleContext *stylectxt;
         gchar *col_str, *widget_css;
-#endif
+
         if (!GTK_IS_EVENT_BOX (tab_widget))
         {
             GtkWidget *event_box = gtk_event_box_new ();
@@ -2316,7 +2315,7 @@ main_window_update_page_color (GncPluginPage *page,
             g_object_unref (tab_widget);
             tab_widget = event_box;
         }
-#if GTK_CHECK_VERSION(3,16,0)
+
         stylectxt = gtk_widget_get_style_context (GTK_WIDGET (tab_widget));
         col_str = gdk_rgba_to_string (&tab_color);
         widget_css = g_strconcat ("*{\n  background-color:", col_str, ";\n}\n", NULL);
@@ -2327,10 +2326,6 @@ main_window_update_page_color (GncPluginPage *page,
         g_object_unref (provider);
         g_free (col_str);
         g_free (widget_css);
-#else
-        gtk_widget_override_background_color (tab_widget, GTK_STATE_NORMAL, &tab_color);
-        gtk_widget_override_background_color (tab_widget, GTK_STATE_ACTIVE, &tab_color);
-#endif
     }
     else
     {
diff --git a/src/gnome-utils/gnc-tree-view-split-reg.c b/src/gnome-utils/gnc-tree-view-split-reg.c
index 2dfc06ec68..32e42c3e51 100644
--- a/src/gnome-utils/gnc-tree-view-split-reg.c
+++ b/src/gnome-utils/gnc-tree-view-split-reg.c
@@ -5799,7 +5799,6 @@ gtv_sr_editable_start_editing_cb (GtkCellRenderer *cr, GtkCellEditable *editable
         {
             if (entry != NULL)
             {
-#if GTK_CHECK_VERSION(3,16,0)
                 GtkStyleContext *stylectxt = gtk_widget_get_style_context (GTK_WIDGET (entry));
                 GtkCssProvider *provider = gtk_css_provider_new();
                 gchar *col_str = gdk_rgba_to_string (&color);
@@ -5811,9 +5810,6 @@ gtv_sr_editable_start_editing_cb (GtkCellRenderer *cr, GtkCellEditable *editable
                 g_object_unref (provider);
                 g_free (col_str);
                 g_free (widget_css);
-#else
-                gtk_widget_override_background_color (GTK_WIDGET (entry), GTK_STATE_FLAG_NORMAL, &color);
-#endif
             }
         }
     }
diff --git a/src/gnome/assistant-hierarchy.c b/src/gnome/assistant-hierarchy.c
index f9b61551e0..b0625f2111 100644
--- a/src/gnome/assistant-hierarchy.c
+++ b/src/gnome/assistant-hierarchy.c
@@ -1197,14 +1197,10 @@ assistant_insert_book_options_page (hierarchy_data *data)
     options = gnc_options_dialog_notebook (data->optionwin);
     parent = gtk_widget_get_parent (options);
 
-#if GTK_CHECK_VERSION(3, 14, 0)
     g_object_ref (options);
     gtk_container_remove (GTK_CONTAINER(parent), options);
     gtk_container_add (GTK_CONTAINER(vbox), options);
     g_object_unref (options);
-#else
-    gtk_widget_reparent (options, vbox);
-#endif
 
     gtk_widget_show_all (vbox);
     gtk_assistant_insert_page (GTK_ASSISTANT(data->dialog), vbox, 1);
diff --git a/src/import-export/import-main-matcher.c b/src/import-export/import-main-matcher.c
index d0cbb70f82..5c4ed61efa 100644
--- a/src/import-export/import-main-matcher.c
+++ b/src/import-export/import-main-matcher.c
@@ -203,7 +203,6 @@ on_matcher_help_close_clicked (GtkButton *button, gpointer user_data)
     gtk_widget_destroy(help_dialog);
 }
 
-#if GTK_CHECK_VERSION(3,16,0)
 static void
 gnc_override_background_color (GtkWidget *widget,
                                GdkRGBA   *rgba)
@@ -220,8 +219,6 @@ gnc_override_background_color (GtkWidget *widget,
     g_free (col_str);
     g_free (widget_css);
 }
-#endif
-
 
 void
 on_matcher_help_clicked (GtkButton *button, gpointer user_data)
@@ -238,28 +235,13 @@ on_matcher_help_clicked (GtkButton *button, gpointer user_data)
     gnc_builder_add_from_file (builder, "dialog-import.glade", "matcher_help_dialog");
 
     box = GTK_WIDGET(gtk_builder_get_object (builder, "red"));
-#if GTK_CHECK_VERSION(3,16,0)
     gnc_override_background_color (box, &info->color_back_red);
-#else
-    gtk_widget_override_background_color(box, GTK_STATE_FLAG_NORMAL,
-                                         &info->color_back_red);
-#endif
 
     box = GTK_WIDGET(gtk_builder_get_object (builder, "yellow"));
-#if GTK_CHECK_VERSION(3,16,0)
     gnc_override_background_color (box, &info->color_back_yellow);
-#else
-    gtk_widget_override_background_color(box, GTK_STATE_FLAG_NORMAL,
-                                         &info->color_back_yellow);
-#endif
 
     box = GTK_WIDGET(gtk_builder_get_object (builder, "green"));
-#if GTK_CHECK_VERSION(3,16,0)
     gnc_override_background_color (box, &info->color_back_green);
-#else
-    gtk_widget_override_background_color(box, GTK_STATE_FLAG_NORMAL,
-                                         &info->color_back_green);
-#endif
 
     help_dialog = GTK_WIDGET(gtk_builder_get_object (builder, "matcher_help_dialog"));
     gtk_window_set_transient_for(GTK_WINDOW(help_dialog),
diff --git a/src/register/register-gnome/gnucash-header.c b/src/register/register-gnome/gnucash-header.c
index e04eb7e82e..06b9fcaf79 100644
--- a/src/register/register-gnome/gnucash-header.c
+++ b/src/register/register-gnome/gnucash-header.c
@@ -585,11 +585,7 @@ gnc_header_init (GncHeader *header)
     header->cursor_name = NULL;
     header->in_resize = FALSE;
     header->resize_col = -1;
-#if GTK_CHECK_VERSION(3,16,0)
     header->resize_cursor = gdk_cursor_new_for_display (gdk_display_get_default (), GDK_SB_H_DOUBLE_ARROW);
-#else
-    header->resize_cursor = gdk_cursor_new (GDK_SB_H_DOUBLE_ARROW);
-#endif
     header->normal_cursor = NULL;
     header->height = 20;
     header->width = 400;
diff --git a/src/register/register-gnome/gnucash-item-edit.c b/src/register/register-gnome/gnucash-item-edit.c
index f9e87ab7d9..dc0e88de4c 100644
--- a/src/register/register-gnome/gnucash-item-edit.c
+++ b/src/register/register-gnome/gnucash-item-edit.c
@@ -527,11 +527,7 @@ gnc_item_edit_new (GnucashSheet *sheet)
     /* Create the popup button
        It will only be displayed when the cell being edited provides
        a popup item (like a calendar or account list) */
-#if GTK_CHECK_VERSION(3,14,0)
     item_edit->popup_toggle.arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    item_edit->popup_toggle.arrow = GTK_WIDGET(gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_IN));
-#endif
 
     item_edit->popup_toggle.tbutton = gtk_toggle_button_new();
     gtk_toggle_button_set_mode (
@@ -645,11 +641,7 @@ gnc_item_edit_show_popup (GncItemEdit *item_edit)
         unblock_toggle_signals (item_edit);
     }
 
-#if GTK_CHECK_VERSION(3,14,0)
     item_edit->popup_toggle.arrow = gtk_image_new_from_icon_name ("go-up", GTK_ICON_SIZE_BUTTON);
-#else
-    gtk_arrow_set (GTK_ARROW(item_edit->popup_toggle.arrow), GTK_ARROW_UP, GTK_SHADOW_OUT);
-#endif
 
     if (item_edit->popup_set_focus)
         item_edit->popup_set_focus (item_edit->popup_item,
@@ -691,11 +683,8 @@ gnc_item_edit_hide_popup (GncItemEdit *item_edit)
         return;
 
     gtk_container_remove (GTK_CONTAINER(item_edit->sheet), item_edit->popup_item);
-#if GTK_CHECK_VERSION(3,14,0)
+
     item_edit->popup_toggle.arrow = gtk_image_new_from_icon_name ("go-down", GTK_ICON_SIZE_BUTTON);
-#else
-    gtk_arrow_set (GTK_ARROW(item_edit->popup_toggle.arrow), GTK_ARROW_DOWN, GTK_SHADOW_IN);
-#endif
 
     gtk_toggle_button_set_active
     (GTK_TOGGLE_BUTTON(item_edit->popup_toggle.tbutton), FALSE);
diff --git a/src/register/register-gnome/gnucash-sheet.c b/src/register/register-gnome/gnucash-sheet.c
index 360a7e2482..4b4152ba44 100644
--- a/src/register/register-gnome/gnucash-sheet.c
+++ b/src/register/register-gnome/gnucash-sheet.c
@@ -597,10 +597,6 @@ gnucash_sheet_update_adjustments (GnucashSheet *sheet)
             gtk_adjustment_get_page_size (vadj) / sheet->num_visible_blocks);
     else
         gtk_adjustment_set_step_increment (vadj, 0);
-
-#if !GTK_CHECK_VERSION(3,18,0)
-    gtk_adjustment_changed(vadj);
-#endif
 }