diff --git a/.hgtags b/.hgtags
index 04094cfb229..98cf8d123bd 100644
--- a/.hgtags
+++ b/.hgtags
@@ -23,3 +23,4 @@ fb128ab641015e92cc0c227a2e3be3ae71aba00d v1.5a2
 548822e716199517482dab9ea77cf6c7ae57f6f5 v1.5b2
 c6cb9dd6301feb193992f97f07d32a7c01e22ffc v1.5
 38b89e87b4d8706569c252ef36066657e35782cf v1.5.1
+21c500f1f5ac52bc0b7a176f9c152a1b8bf70642 v1.5.2a1