diff --git a/ChangeLog b/ChangeLog
index 8d0e5bae6e..71222da090 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-08-15  Manish Singh  <yosh@gimp.org>
+
+	* plug-ins/common/sample_colorize.c (smp_constrain): add an extra
+	user data arg, so we fit the GimpDrawableConstraintFunc type.
+
 2005-08-15  Karine Delvare  <kdelvare@nerim.net>
 
 	* app/tools/gimprectangletool.[ch]
diff --git a/plug-ins/common/sample_colorize.c b/plug-ins/common/sample_colorize.c
index b600773e77..1821da0511 100644
--- a/plug-ins/common/sample_colorize.c
+++ b/plug-ins/common/sample_colorize.c
@@ -541,8 +541,9 @@ smp_dest_combo_callback (GtkWidget *widget)
 }
 
 static gint
-smp_constrain (gint32 image_id,
-               gint32 drawable_id)
+smp_constrain (gint32   image_id,
+               gint32   drawable_id,
+	       gpointer data)
 {
   if (image_id < 0)
     return FALSE;