diff --git a/base/public/Makefile.in b/base/public/Makefile.in
index 173e990617e9..7979d7c1cbc4 100644
--- a/base/public/Makefile.in
+++ b/base/public/Makefile.in
@@ -25,6 +25,7 @@ include $(DEPTH)/config/autoconf.mk
 DEFINES += -D_IMPL_NS_BASE
 
 EXPORTS =		\
+    nsIProperties.h	\
     nsISizeOfHandler.h	\
     nsEscape.h          \
     nsFileSpec.h        \