diff --git a/mozilla/gfx/src/ps/nsPostScriptObj.cpp b/mozilla/gfx/src/ps/nsPostScriptObj.cpp
index 36e997ad9ad..1c23ac3ff26 100644
--- a/mozilla/gfx/src/ps/nsPostScriptObj.cpp
+++ b/mozilla/gfx/src/ps/nsPostScriptObj.cpp
@@ -42,6 +42,7 @@
 
 #include "nsICharsetAlias.h"
 #include "nslog.h"
+#undef fprintf
 
 NS_IMPL_LOG(nsPostScriptObjLog)
 #define PRINTF NS_LOG_PRINTF(nsPostScriptObjLog)