diff --git a/xpfe/apprunner/src/makefile.win b/xpfe/apprunner/src/makefile.win
index 6b9a67dc3cfd..e35187c9ccfd 100644
--- a/xpfe/apprunner/src/makefile.win
+++ b/xpfe/apprunner/src/makefile.win
@@ -22,11 +22,11 @@ DEFINES=-D_IMPL_NS_APPRUNNER -DWIN32_LEAN_AND_MEAN
 MODULE=raptor 
 
 CPPSRCS=            \
-	nsAppRunner.cpp \
+	nsAppRunnerImpl.cpp \
 	$(NULL)
 
 CPP_OBJS=                       \
-	.\$(OBJDIR)\nsAppRunner.obj \
+	.\$(OBJDIR)\nsAppRunnerImpl.obj \
 	$(NULL)
 
 LINCS=                 \
diff --git a/xpfe/apprunner/src/nsAppRunner.cpp b/xpfe/apprunner/src/nsAppRunnerImpl.cpp
similarity index 99%
rename from xpfe/apprunner/src/nsAppRunner.cpp
rename to xpfe/apprunner/src/nsAppRunnerImpl.cpp
index 5d5cae8d92ef..a7459bb8f599 100644
--- a/xpfe/apprunner/src/nsAppRunner.cpp
+++ b/xpfe/apprunner/src/nsAppRunnerImpl.cpp
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 
-#include "nsAppRunner.h"
+#include "nsAppRunnerImpl.h"
 #include "nsIAppShellService.h"
 #include "nsIComponentManager.h"
 #include "nsIServiceManager.h"
diff --git a/xpfe/apprunner/src/nsAppRunner.h b/xpfe/apprunner/src/nsAppRunnerImpl.h
similarity index 100%
rename from xpfe/apprunner/src/nsAppRunner.h
rename to xpfe/apprunner/src/nsAppRunnerImpl.h