diff --git a/src/gnome-utils/gnc-cell-renderer-date.c b/src/gnome-utils/gnc-cell-renderer-date.c
index e2249b49e2..bb13c7fb82 100644
--- a/src/gnome-utils/gnc-cell-renderer-date.c
+++ b/src/gnome-utils/gnc-cell-renderer-date.c
@@ -77,8 +77,8 @@ GtkCellEditable *gcrd_start_editing          (GtkCellRenderer         *cell,
 					      GdkEvent                *event,
 					      GtkWidget               *widget,
 					      const gchar             *path,
-					      GdkRectangle            *background_area,
-					      GdkRectangle            *cell_area,
+					      const GdkRectangle      *background_area,
+					      const GdkRectangle      *cell_area,
 					      GtkCellRendererState     flags);
 
 static void     gcrd_show                    (GncCellRendererPopup     *cell,
@@ -269,8 +269,8 @@ gcrd_start_editing (GtkCellRenderer      *cell,
 		    GdkEvent             *event,
 		    GtkWidget            *widget,
 		    const gchar          *path,
-		    GdkRectangle         *background_area,
-		    GdkRectangle         *cell_area,
+		    const GdkRectangle   *background_area,
+		    const GdkRectangle   *cell_area,
 		    GtkCellRendererState  flags)
 {
 	GNC_CELL_RENDERER_POPUP (cell)->editing_canceled = FALSE;
diff --git a/src/gnome-utils/gnc-cell-renderer-popup.c b/src/gnome-utils/gnc-cell-renderer-popup.c
index 19386d5e90..f8e06f1804 100644
--- a/src/gnome-utils/gnc-cell-renderer-popup.c
+++ b/src/gnome-utils/gnc-cell-renderer-popup.c
@@ -49,8 +49,8 @@ gcrp_start_editing                       (GtkCellRenderer          *cell,
 					  GdkEvent                 *event,
 					  GtkWidget                *widget,
 					  const gchar              *path,
-					  GdkRectangle             *background_area,
-					  GdkRectangle             *cell_area,
+					  const GdkRectangle       *background_area,
+					  const GdkRectangle       *cell_area,
 					  GtkCellRendererState      flags);
 static void      gcrp_show_popup         (GncCellRendererPopup      *cell,
 					  const gchar              *path,
@@ -61,7 +61,7 @@ static void      gcrp_show_popup         (GncCellRendererPopup      *cell,
 static void      gcrp_hide_popup         (GncCellRendererPopup      *cell);
 static void      gcrp_get_size           (GtkCellRenderer          *cell,
 					  GtkWidget                *widget,
-					  GdkRectangle             *cell_area,
+					  const GdkRectangle       *cell_area,
 					  gint                     *x_offset,
 					  gint                     *y_offset,
 					  gint                     *width,
@@ -369,8 +369,8 @@ gcrp_start_editing (GtkCellRenderer      *cell,
 		    GdkEvent             *event,
 		    GtkWidget            *widget,
 		    const gchar          *path,
-		    GdkRectangle         *background_area,
-		    GdkRectangle         *cell_area,
+		    const GdkRectangle   *background_area,
+		    const GdkRectangle   *cell_area,
 		    GtkCellRendererState  flags)
 {
 	GncCellRendererPopup *popup;
@@ -434,13 +434,13 @@ gnc_cell_renderer_popup_hide (GncCellRendererPopup *cell)
 }
 
 static void
-gcrp_get_size (GtkCellRenderer *cell,
-	       GtkWidget       *widget,
-	       GdkRectangle    *cell_area,
-	       gint            *x_offset,
-	       gint            *y_offset,
-	       gint            *width,
-	       gint            *height)
+gcrp_get_size (GtkCellRenderer    *cell,
+	       GtkWidget          *widget,
+	       const GdkRectangle *cell_area,
+	       gint               *x_offset,
+	       gint               *y_offset,
+	       gint               *width,
+	       gint               *height)
 {
 	GncCellRendererPopup *popup;