diff --git a/.hgtags b/.hgtags
index 0f4322294..1228a9446 100644
--- a/.hgtags
+++ b/.hgtags
@@ -434,3 +434,4 @@ f062e43d74fc2578bb100a9e82a953efa1eb9e4e release-1.15.5
 2351853ce6867b6166823bdf94333c0a76633c0a release-1.15.6
 051a039ce1c7e09144de4a4846669ec7116cecea release-1.15.7
 ee551e3f6dba336c0d875e266d7d55385f379b42 release-1.15.8
+d2fd76709909767fc727a5b4affcf1dc9ca488a7 release-1.15.9