diff --git a/embedding/browser/gtk/src/Makefile.in b/embedding/browser/gtk/src/Makefile.in
index 846b4982421..532b3b6bcb5 100644
--- a/embedding/browser/gtk/src/Makefile.in
+++ b/embedding/browser/gtk/src/Makefile.in
@@ -86,6 +86,7 @@ REQUIRES	= xpcom \
 		  widget \
 		  dom \
 		  gfx \
+		  thebes \
 		  intl \
 		  imglib2 \
 		  layout \