diff --git a/.hgtags b/.hgtags
index 79a0e7e7b20..1572143a51c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -53,3 +53,4 @@ ed396533d05e26c9d4a91fc94f89c0033fc7ae04 v2.4b2
 bbce19cba40401a87508677a2d6719397ccc2d8c v2.4c1
 9aed528daf61c323e10448ebd44ba70b92579023 v2.4
 3dabd9bb496e9a68cd6cd94b7622973fc766405a v2.5a0
+0000000000000000000000000000000000000000 v2.5a0