diff --git a/builder-turkish.patch b/builder-turkish.patch
new file mode 100644
index 0000000..af00db7
--- /dev/null
+++ b/builder-turkish.patch
@@ -0,0 +1,30 @@
+--- trunk/gtk/gtkbuilder.c	2007/09/14 00:56:57	18820
++++ trunk/gtk/gtkbuilder.c	2007/10/22 09:15:50	18939
+@@ -21,7 +21,6 @@
+  */
+ 
+ #include <config.h>
+-#include <ctype.h> /* tolower, toupper */
+ #include <errno.h> /* errno */
+ #include <stdlib.h> /* strtol, strtoul */
+ #include <string.h> /* strlen */
+@@ -210,13 +209,13 @@
+     {
+       c = name[i];
+       /* skip if uppercase, first or previous is uppercase */
+-      if ((c == toupper (c) &&
+-           i > 0 && name[i-1] != toupper (name[i-1])) ||
+-          (i > 2 && name[i]   == toupper (name[i]) &&
+-           name[i-1] == toupper (name[i-1]) &&
+-           name[i-2] == toupper (name[i-2])))
++      if ((c == g_ascii_toupper (c) &&
++           i > 0 && name[i-1] != g_ascii_toupper (name[i-1])) ||
++          (i > 2 && name[i]   == g_ascii_toupper (name[i]) &&
++           name[i-1] == g_ascii_toupper (name[i-1]) &&
++           name[i-2] == g_ascii_toupper (name[i-2])))
+         g_string_append_c (symbol_name, '_');
+-      g_string_append_c (symbol_name, tolower (c));
++      g_string_append_c (symbol_name, g_ascii_tolower (c));
+     }
+   g_string_append (symbol_name, "_get_type");
+   
diff --git a/gtk2.spec b/gtk2.spec
index a3c5f85..acc722d 100644
--- a/gtk2.spec
+++ b/gtk2.spec
@@ -16,7 +16,7 @@
 Summary: The GIMP ToolKit (GTK+), a library for creating GUIs for X
 Name: gtk2
 Version: %{base_version}
-Release: 3%{?dist}
+Release: 5%{?dist}
 License: LGPLv2+
 Group: System Environment/Libraries
 Source: http://download.gnome.org/sources/gtk+/2.12/gtk+-%{version}.tar.bz2
@@ -37,6 +37,9 @@ Patch3: firefox-print-preview.patch
 # http://bugzilla.gnome.org/show_bug.cgi?id=488119
 Patch4: system-log-crash.patch
 
+# fixed in upstream svn
+Patch5: builder-turkish.patch
+
 BuildRequires: atk-devel >= %{atk_version}
 BuildRequires: pango-devel >= %{pango_version}
 BuildRequires: glib2-devel >= %{glib2_version}
@@ -115,6 +118,7 @@ docs for the GTK+ widget toolkit.
 %patch2 -p1 -b .workaround
 %patch3 -p1 -b .firefox-print-preview
 %patch4 -p1 -b .system-log-crash
+%patch5 -p1 -b .builder-turkish
 
 for i in config.guess config.sub ; do
   test -f %{_datadir}/libtool/$i && cp %{_datadir}/libtool/$i .
@@ -297,6 +301,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/gtk-2.0
 
 %changelog
+* Thu Oct 25 2007 Matthias Clasen <mclasen@redhat.com> - 2.12.1-5
+- Fix a bug that prevents GtkBuilder-using apps (like totem)
+  to run in some locales (like Turkish) (#348631)
+
 * Mon Oct 22 2007 Matthias Clasen <mclasen@redhat.com> - 2.12.1-4
 - Fix a crash in gnome-system-log (#321701)