diff --git a/xpfe/appshell/public/Makefile.in b/xpfe/appshell/public/Makefile.in
index 1f9ea9a78723..ce669e2aa2f5 100644
--- a/xpfe/appshell/public/Makefile.in
+++ b/xpfe/appshell/public/Makefile.in
@@ -24,6 +24,7 @@ include $(DEPTH)/config/autoconf.mk
 include $(topsrcdir)/config/config.mk
 
 EXPORTS =                         \
+        nsIXULCommand.h          \
         nsAppShellCIDs.h          \
         nsIAppShellService.h      \
 	nsICmdLineService.h	  \