diff --git a/content/html/content/src/HTMLCanvasElement.cpp b/content/html/content/src/HTMLCanvasElement.cpp
index b8cd1c17ef88..654d4839f83c 100644
--- a/content/html/content/src/HTMLCanvasElement.cpp
+++ b/content/html/content/src/HTMLCanvasElement.cpp
@@ -9,6 +9,7 @@
 #include "imgIEncoder.h"
 #include "jsapi.h"
 #include "jsfriendapi.h"
+#include "gfxImageSurface.h"
 #include "mozilla/Base64.h"
 #include "mozilla/CheckedInt.h"
 #include "mozilla/dom/CanvasRenderingContext2D.h"