--- a/dom/ipc/ContentProcess.h
+++ b/dom/ipc/ContentProcess.h
@@ -6,19 +6,16 @@
 
 #ifndef dom_tabs_ContentThread_h
 #define dom_tabs_ContentThread_h 1
 
 #include "mozilla/ipc/ProcessChild.h"
 #include "mozilla/ipc/ScopedXREEmbed.h"
 #include "ContentChild.h"
 
-#undef _MOZ_LOG
-#define _MOZ_LOG(s)  printf("[ContentProcess] %s", s)
-
 namespace mozilla {
 namespace dom {
 
 /**
  * ContentProcess is a singleton on the content process which represents
  * the main thread where tab instances live.
  */
 class ContentProcess : public mozilla::ipc::ProcessChild