diff --git a/profile/pref-migrator/public/Makefile.in b/profile/pref-migrator/public/Makefile.in
index 5b2a063aa46..3e83f7faf7d 100644
--- a/profile/pref-migrator/public/Makefile.in
+++ b/profile/pref-migrator/public/Makefile.in
@@ -28,6 +28,7 @@ EXPORTS		= nsPrefMigrationCIDs.h
 
 XPIDLSRCS	= \
 		nsIPrefMigration.idl \
+		nsIPrefMigrationProgress.idl \
 		$(NULL)
 
 EXPORTS		:= $(addprefix $(srcdir)/, $(EXPORTS))