diff --git a/mozilla/mailnews/base/src/makefile.win b/mozilla/mailnews/base/src/makefile.win
index 56d18a2cdfe..2e33e82662e 100644
--- a/mozilla/mailnews/base/src/makefile.win
+++ b/mozilla/mailnews/base/src/makefile.win
@@ -64,6 +64,7 @@ EXPORTS=                    \
 	nsNewsSet.h         \
 	nsMsgLineBuffer.h \
 	nsMsgGroupRecord.h  \
+	nsLocalFolderSummarySpec.h \
 	$(NULL)