diff --git a/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp b/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
index 3f5c69d31d0..55dfa8cea25 100644
--- a/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -97,8 +97,9 @@
 #include "nsTArray.h"
 
 #include "cairo.h"
-#ifndef MOZILLA_1_8_BRANCH
 #include "imgIEncoder.h"
+#ifdef MOZILLA_1_8_BRANCH
+#define imgIEncoder imgIEncoder_MOZILLA_1_8_BRANCH
 #endif
 
 #ifdef MOZ_CAIRO_GFX