diff --git a/mozilla/embedding/tests/makefile.win b/mozilla/embedding/tests/makefile.win
index bf5909ec5e4..37a6338098d 100644
--- a/mozilla/embedding/tests/makefile.win
+++ b/mozilla/embedding/tests/makefile.win
@@ -20,6 +20,10 @@
 
 DEPTH=..\..
 
-DIRS=winEmbed mfcembed
+DIRS=winEmbed
+
+!if !defined(NO_MFC)
+DIRS=$(DIRS) mfcembed
+!endif
 
 include <$(DEPTH)\config\rules.mak>