--- a/layout/base/MobileViewportManager.cpp
+++ b/layout/base/MobileViewportManager.cpp
@@ -11,18 +11,18 @@
 #include "nsIFrame.h"
 #include "nsLayoutUtils.h"
 #include "nsPresShell.h"
 #include "nsViewManager.h"
 #include "nsViewportInfo.h"
 #include "UnitTransforms.h"
 #include "nsIDocument.h"
 
-#define MVM_LOG(...)
-// #define MVM_LOG(...) printf_stderr("MVM: " __VA_ARGS__)
+// #define MVM_LOG(...)
+#define MVM_LOG(...) printf_stderr("MVM: " __VA_ARGS__)
 
 NS_IMPL_ISUPPORTS(MobileViewportManager, nsIDOMEventListener, nsIObserver)
 
 static const nsLiteralString DOM_META_ADDED = NS_LITERAL_STRING("DOMMetaAdded");
 static const nsLiteralString DOM_META_CHANGED = NS_LITERAL_STRING("DOMMetaChanged");
 static const nsLiteralString FULL_ZOOM_CHANGE = NS_LITERAL_STRING("FullZoomChange");
 static const nsLiteralString LOAD = NS_LITERAL_STRING("load");
 static const nsLiteralCString BEFORE_FIRST_PAINT = NS_LITERAL_CSTRING("before-first-paint");