diff --git a/mozilla/gfx/thebes/src/gfxPlatformGtk.cpp b/mozilla/gfx/thebes/src/gfxPlatformGtk.cpp
index 826f997094e..17ef32da9cb 100644
--- a/mozilla/gfx/thebes/src/gfxPlatformGtk.cpp
+++ b/mozilla/gfx/thebes/src/gfxPlatformGtk.cpp
@@ -53,6 +53,8 @@
 
 #include "gfxPangoFonts.h"
 
+#include <pango/pangocairo.h>
+
 #ifdef MOZ_ENABLE_GLITZ
 #include "gfxGlitzSurface.h"
 #include "glitz-glx.h"