diff --git a/xpfe/components/winhooks/Makefile.in b/xpfe/components/winhooks/Makefile.in
index 994a7ae55c0..d677a07ec64 100644
--- a/xpfe/components/winhooks/Makefile.in
+++ b/xpfe/components/winhooks/Makefile.in
@@ -69,6 +69,10 @@ REQUIRES	= \
 
 FORCE_STATIC_LIB = 1
 
+ifdef MOZ_XUL_APP
+LOCAL_INCLUDES += -I$(topsrcdir)/toolkit/xre
+endif
+
 include $(topsrcdir)/config/rules.mk
 
 JS_SET_BROWSER_COMPONENT = nsSetDefaultBrowser.js