diff --git a/.hgtags b/.hgtags
index 8d8e7fa14..b7e1019ca 100644
--- a/.hgtags
+++ b/.hgtags
@@ -364,3 +364,4 @@ cd84e467c72967b9f5fb4d96bfc708c93edeb634 release-1.3.15
 70c5cd3a61cb476c2afb3a61826e59c7cda0b7a7 release-1.5.6
 9ba2542d75bf62a3972278c63561fc2ef5ec573a release-1.5.7
 eaa76f24975948b0ce8be01838d949122d44ed67 release-1.5.8
+5a1759f33b7fa6270e1617c08d7e655b7b127f26 release-1.5.9