diff --git a/.hgtags b/.hgtags
index e7144757c53..f50083fb987 100644
--- a/.hgtags
+++ b/.hgtags
@@ -257,3 +257,4 @@ efe7dbc6088691757404e0c8745f894e3ca9c022 jdk9-b09
 0d1f816217dce5e72187f167cc1816080cbeb453 jdk9-b12
 1a30593dcb9802faec3b6edb24d86ca088594e4e jdk9-b13
 97932f6ad950ae5a73a9da5c96e6e58503ff646b jdk9-b14
+74eb0778e4f2dbff6628e718378449fba27c4265 jdk9-b15