diff --git a/ChangeLog b/ChangeLog
index fbbb0705b3..f9e74f6ecd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2007-02-05  Sven Neumann  <sven@gimp.org>
+
+	* gimp.pc.in (Requires)
+	* gimpui.pc.in (Requires): substitute minimum required versions of
+	glib and gtk+ instead of hardcoding them.
+
 2007-02-03  Michael Natterer  <mitch@gimp.org>
 
 	Remove support for the old undo pop and free cruft:
diff --git a/gimp.pc.in b/gimp.pc.in
index 1fdec09c14..9d0058ae9c 100644
--- a/gimp.pc.in
+++ b/gimp.pc.in
@@ -12,6 +12,6 @@ gimplocaledir=@gimplocaledir@
 Name: GIMP
 Description: GIMP Library
 Version: @GIMP_REAL_VERSION@
-Requires: glib-2.0
+Requires: glib-2.0 >= @GLIB_REQUIRED_VERSION@
 Libs: -L${libdir} -lgimp-@GIMP_API_VERSION@ -lgimpmath-@GIMP_API_VERSION@  -lgimpconfig-@GIMP_API_VERSION@ -lgimpcolor-@GIMP_API_VERSION@ -lgimpbase-@GIMP_API_VERSION@ @RT_LIBS@
 Cflags: -I${includedir}/gimp-@GIMP_API_VERSION@
diff --git a/gimpui.pc.in b/gimpui.pc.in
index b75001d373..c6e3594790 100644
--- a/gimpui.pc.in
+++ b/gimpui.pc.in
@@ -6,6 +6,6 @@ includedir=@includedir@
 Name: GIMP UI
 Description: GIMP User Interface Library
 Version: @GIMP_REAL_VERSION@
-Requires: gimp-@GIMP_PKGCONFIG_VERSION@ gtk+-2.0 >= 2.2.0
+Requires: gimp-@GIMP_PKGCONFIG_VERSION@ gtk+-2.0 >= @GTK_REQUIRED_VERSION@
 Libs: -L${libdir} -lgimpui-@GIMP_API_VERSION@ -lgimpwidgets-@GIMP_API_VERSION@ -lgimpmodule-@GIMP_API_VERSION@
 Cflags: -I${includedir}/gimp-@GIMP_API_VERSION@