diff --git a/mozilla/embedding/browser/activex/src/plugin/Makefile.in b/mozilla/embedding/browser/activex/src/plugin/Makefile.in
index 0284bd0d85e..58edfdf9f22 100644
--- a/mozilla/embedding/browser/activex/src/plugin/Makefile.in
+++ b/mozilla/embedding/browser/activex/src/plugin/Makefile.in
@@ -136,7 +136,7 @@ ifdef XPC_IDISPATCH_SUPPORT
 CPPSRCS += PrefObserver.cpp
 endif
 
-LOCAL_INCLUDES = -I$(MOZCTLSRC)
+LOCAL_INCLUDES = -I$(srcdir) -I$(MOZCTLSRC)
 
 ifdef MOZ_ACTIVEX_PLUGIN_LIVECONNECT
 LOCAL_INCLUDES += -I./_java