diff --git a/.hgtags b/.hgtags
index e01b3e6f..8b828c30 100644
--- a/.hgtags
+++ b/.hgtags
@@ -93,3 +93,4 @@ e294cf118a1d303b104d69276a6b135dd531fbc5 RECOLL_1_15_2
 5fc5a9f1024662b00cb14eaa46f6d946cbb152a4 RECOLL_1_15_3
 6411512e32046a5b36daa6aa6badc5d6fc6e5228 RECOLL_1_15_4
 e511881a1c39e1e396e81739194329decdb0a1bb RECOLL_1_15_5
+8a4df135a3a7398de608faa0b5e43edd27021e20 RECOLL_1_15_6