diff --git a/mozilla/xpfe/appshell/src/Makefile.in b/mozilla/xpfe/appshell/src/Makefile.in
index 3daade0c6f9..9b96c3bbebc 100644
--- a/mozilla/xpfe/appshell/src/Makefile.in
+++ b/mozilla/xpfe/appshell/src/Makefile.in
@@ -48,6 +48,7 @@ CPPSRCS		= \
 		nsWindowMediator.cpp \
 		nsAbout.cpp \
 		nsAppShellFactory.cpp \
+		nsTimingService.cpp \
 		$(NULL)
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),os2)
diff --git a/mozilla/xpfe/appshell/src/makefile.win b/mozilla/xpfe/appshell/src/makefile.win
index 78ff15082ae..5b72f5372ed 100644
--- a/mozilla/xpfe/appshell/src/makefile.win
+++ b/mozilla/xpfe/appshell/src/makefile.win
@@ -42,6 +42,7 @@ CPP_OBJS=                               \
      .\$(OBJDIR)\nsWindowMediator.obj        \
 	.\$(OBJDIR)\nsAbout.obj \
 	.\$(OBJDIR)\nsUserInfoWin.obj \
+	.\$(OBJDIR)\nsTimingService.obj \
  $(NULL)
 
 LINCS=-I$(PUBLIC)\raptor                \