diff --git a/src/app-utils/app-utils.i b/src/app-utils/app-utils.i
index eb443a349f..72783a3124 100644
--- a/src/app-utils/app-utils.i
+++ b/src/app-utils/app-utils.i
@@ -15,7 +15,7 @@
 #include <guile-util.h>
 #include <app-utils/gnc-sx-instance-model.h>
 
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 %}
 
 #if defined(SWIGGUILE)
diff --git a/src/app-utils/gnc-helpers.c b/src/app-utils/gnc-helpers.c
index 97754931e8..118e40b94b 100644
--- a/src/app-utils/gnc-helpers.c
+++ b/src/app-utils/gnc-helpers.c
@@ -29,7 +29,7 @@
 #include "swig-runtime.h"
 
 #include "gnc-engine.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "gnc-helpers.h"
 #include "gnc-ui-util.h"
 
diff --git a/src/app-utils/guile-util.c b/src/app-utils/guile-util.c
index d7652e311f..ec2cf3c564 100644
--- a/src/app-utils/guile-util.c
+++ b/src/app-utils/guile-util.c
@@ -37,7 +37,7 @@
 #endif
 
 #include "qof.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "glib-helpers.h"
 #include "gnc-gconf-utils.h"
 #include "gnc-glib-utils.h"
diff --git a/src/app-utils/option-util.c b/src/app-utils/option-util.c
index 50c3860045..5e99e09fe0 100644
--- a/src/app-utils/option-util.c
+++ b/src/app-utils/option-util.c
@@ -29,8 +29,9 @@
 #include <time.h>
 #include <string.h>
 
+#include "Account.h"
 #include "option-util.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "glib-helpers.h"
 #include "gnc-guile-utils.h"
 #include "qof.h"
diff --git a/src/bin/gnucash-bin.c b/src/bin/gnucash-bin.c
index ea95e01de3..2cc967dfda 100644
--- a/src/bin/gnucash-bin.c
+++ b/src/bin/gnucash-bin.c
@@ -50,7 +50,7 @@
 #include "gnc-gconf-utils.h"
 #include "dialog-new-user.h"
 #include "gnc-session.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "swig-runtime.h"
 
 /* This static indicates the debugging module that this .o belongs to.  */
diff --git a/src/engine/Makefile.am b/src/engine/Makefile.am
index dc58731abe..46724eeb0f 100644
--- a/src/engine/Makefile.am
+++ b/src/engine/Makefile.am
@@ -77,6 +77,7 @@ gncinclude_HEADERS = \
   cap-gains.h \
   cashobjects.h \
   engine-helpers.h \
+  engine-helpers-guile.h \
   glib-helpers.h \
   gnc-budget.h \
   gnc-commodity.h \
diff --git a/src/engine/engine-helpers.c b/src/engine/engine-helpers.c
index f766ec360a..01fe515e37 100644
--- a/src/engine/engine-helpers.c
+++ b/src/engine/engine-helpers.c
@@ -30,6 +30,7 @@
 
 #include "Account.h"
 #include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "glib-helpers.h"
 #include "gnc-date.h"
 #include "gnc-engine.h"
diff --git a/src/engine/engine-helpers.h b/src/engine/engine-helpers.h
index 800cc67413..564cbfe283 100644
--- a/src/engine/engine-helpers.h
+++ b/src/engine/engine-helpers.h
@@ -26,7 +26,6 @@
 #define ENGINE_HELPERS_H
 
 #include <glib.h>
-#include <libguile.h>
 
 #include "gnc-engine.h"
 #include "Account.h"
@@ -87,33 +86,4 @@ gnc_book_option_register_cb (gchar *key, GncBOCb func, gpointer user_data);
 void
 gnc_book_option_remove_cb (gchar *key, GncBOCb func, gpointer user_data);
 
-/* Helpers for various types */
-
-SCM      gnc_timespec2timepair(Timespec t);
-Timespec gnc_timepair2timespec(SCM x);
-GDate    gnc_timepair_to_GDate(SCM x);
-int      gnc_timepair_p(SCM x);
-
-SCM  gnc_guid2scm(GncGUID guid);
-GncGUID gnc_scm2guid(SCM guid_scm);
-int  gnc_guid_p(SCM guid_scm);
-
-/* for a list of strings */
-GSList * gnc_query_scm2path (SCM path_scm);
-
-/* These two functions convert a query object into a scheme
- * representation of the query and vice-versa. They do not
- * simply convert a query pointer to a guile query pointer! */
-SCM gnc_query2scm (QofQuery * q);
-QofQuery * gnc_scm2query (SCM query_scm);
-
-int gnc_gh_gint64_p(SCM num);
-
-SCM gnc_numeric_to_scm(gnc_numeric arg);
-gnc_numeric gnc_scm_to_numeric(SCM arg);
-int gnc_numeric_p(SCM arg);
-gnc_commodity * gnc_scm_to_commodity(SCM scm);
-SCM gnc_commodity_to_scm (const gnc_commodity *commodity);
-SCM gnc_book_to_scm (const QofBook *book);
-
 #endif
diff --git a/src/engine/engine.i b/src/engine/engine.i
index 6ec3e0137e..b255c3efdf 100644
--- a/src/engine/engine.i
+++ b/src/engine/engine.i
@@ -14,6 +14,7 @@
 #include "gnc-lot.h"
 #include "gnc-hooks-scm.h"
 #include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "SX-book.h"
 #include "kvp-scm.h"
 #include "glib-helpers.h"
@@ -126,6 +127,7 @@ functions. */
 }
 
 %include <engine-helpers.h>
+%include <engine-helpers-guile.h>
 %typemap(in) Transaction *trans;
 %typemap(in) Split *split;
 %typemap(in) char * num;
diff --git a/src/engine/gncBusGuile.c b/src/engine/gncBusGuile.c
index f9504b32fa..729e05a173 100644
--- a/src/engine/gncBusGuile.c
+++ b/src/engine/gncBusGuile.c
@@ -25,6 +25,7 @@
 
 #include "gncBusGuile.h"
 #include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "swig-runtime.h"
 #include "guile-mappings.h"
 #define FUNC_NAME G_STRFUNC
diff --git a/src/engine/kvp-scm.c b/src/engine/kvp-scm.c
index c5f74772ff..0b4e1187b0 100644
--- a/src/engine/kvp-scm.c
+++ b/src/engine/kvp-scm.c
@@ -2,7 +2,7 @@
 
 #include "qof.h"
 #include <libguile.h>
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 
 #include "kvp-scm.h"
 #include "guile-mappings.h"
diff --git a/src/gnome-utils/dialog-options.c b/src/gnome-utils/dialog-options.c
index af1f69908f..f3f6c1befc 100644
--- a/src/gnome-utils/dialog-options.c
+++ b/src/gnome-utils/dialog-options.c
@@ -34,7 +34,7 @@
 
 #include "dialog-options.h"
 #include "dialog-utils.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "glib-helpers.h"
 #include "gnc-account-sel.h"
 #include "gnc-tree-view-account.h"
diff --git a/src/gnome-utils/dialog-transfer.c b/src/gnome-utils/dialog-transfer.c
index 6aa0f7230b..d3cb5b173b 100644
--- a/src/gnome-utils/dialog-transfer.c
+++ b/src/gnome-utils/dialog-transfer.c
@@ -47,6 +47,7 @@
 #include "swig-runtime.h"
 #include "guile-mappings.h"
 #include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "app-utils/QuickFill.h"
 
 
diff --git a/src/gnome-utils/gnc-tree-control-split-reg.c b/src/gnome-utils/gnc-tree-control-split-reg.c
index fa1677e54c..badb576833 100644
--- a/src/gnome-utils/gnc-tree-control-split-reg.c
+++ b/src/gnome-utils/gnc-tree-control-split-reg.c
@@ -28,6 +28,7 @@
 
 #include <gtk/gtk.h>
 #include <glib/gi18n.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "gnc-tree-control-split-reg.h"
diff --git a/src/gnome-utils/gnc-tree-view-split-reg.c b/src/gnome-utils/gnc-tree-view-split-reg.c
index c163d8c053..7fe9370554 100644
--- a/src/gnome-utils/gnc-tree-view-split-reg.c
+++ b/src/gnome-utils/gnc-tree-view-split-reg.c
@@ -28,6 +28,7 @@
 
 #include <gtk/gtk.h>
 #include <glib/gi18n.h>
+#include <stdlib.h>
 #include <string.h>
 #include <gdk/gdkkeysyms.h>
 
diff --git a/src/gnome/dialog-price-edit-db.c b/src/gnome/dialog-price-edit-db.c
index 27c3f74e5d..8ad4621160 100644
--- a/src/gnome/dialog-price-edit-db.c
+++ b/src/gnome/dialog-price-edit-db.c
@@ -46,7 +46,7 @@
 #include "gnc-ui.h"
 #include "gnc-ui-util.h"
 #include "guile-util.h"
-#include "engine-helpers.h"
+#include "engine-helpers-guile.h"
 #include "swig-runtime.h"