diff --git a/mozilla/xpcom/base/nsLeakDetector.cpp b/mozilla/xpcom/base/nsLeakDetector.cpp
index a98d911f24a..e2b35c6d0a9 100644
--- a/mozilla/xpcom/base/nsLeakDetector.cpp
+++ b/mozilla/xpcom/base/nsLeakDetector.cpp
@@ -20,7 +20,6 @@
  *   Patrick C. Beard <beard@netscape.com>
  */
 
-#define GC_LEAK_DETECTOR
 #if defined(GC_LEAK_DETECTOR)
 
 #include "nsLeakDetector.h"