diff -ur bmpx-0.40.13.orig/src/sanity.cc bmpx-0.40.13/src/sanity.cc
--- bmpx-0.40.13.orig/src/sanity.cc	2007-10-18 20:17:08.000000000 +0300
+++ bmpx-0.40.13/src/sanity.cc	2008-01-20 16:07:27.000000000 +0200
@@ -69,7 +69,7 @@
 }
 
 C_FUNCTION
-gchar *
+const gchar *
 sanity_check_gtk (void)
 {
   return gtk_check_version (GTK_REQUIRED_MAJOR_VER,