diff --git a/im/app/nsMain.cpp b/im/app/nsMain.cpp
index 6b7cdbfa22..c2069c9a56 100644
--- a/im/app/nsMain.cpp
+++ b/im/app/nsMain.cpp
@@ -17,10 +17,6 @@
 #include <unistd.h>
 #endif
 
-#ifdef XP_MACOSX
-#include "MacQuirks.h"
-#endif
-
 #include <stdio.h>
 #include <stdarg.h>
 #include <time.h>
@@ -316,10 +312,6 @@ int main(int argc, char* argv[], char* envp[])
 {
   mozilla::TimeStamp start = mozilla::TimeStamp::Now();
 
-#ifdef XP_MACOSX
-  TriggerQuirks();
-#endif
-
   nsIFile *xreDirectory;
 
 #ifdef HAS_DLL_BLOCKLIST
diff --git a/mail/app/nsMailApp.cpp b/mail/app/nsMailApp.cpp
index c8ae03da3d..fbd5bf0e41 100644
--- a/mail/app/nsMailApp.cpp
+++ b/mail/app/nsMailApp.cpp
@@ -17,10 +17,6 @@
 #include <unistd.h>
 #endif
 
-#ifdef XP_MACOSX
-#include "MacQuirks.h"
-#endif
-
 #include <stdio.h>
 #include <stdarg.h>
 #include <time.h>
@@ -312,10 +308,6 @@ int main(int argc, char* argv[], char* envp[])
 {
   mozilla::TimeStamp start = mozilla::TimeStamp::Now();
 
-#ifdef XP_MACOSX
-  TriggerQuirks();
-#endif
-
   nsIFile *xreDirectory;
 
 #ifdef HAS_DLL_BLOCKLIST