diff --git a/.hgtags b/.hgtags
index 6b33b2573d..e7d2b61116 100644
--- a/.hgtags
+++ b/.hgtags
@@ -122,3 +122,4 @@ a7bd9a33067b3537351276e0178a045748ad046a go1.1.1
 414057ac1f1fc850957088e4c5e95cdbccd2d594 release
 45475ec7eab1c588fc4210b34d5901b15ca1e479 go1.2rc2
 7422495a6bf9d5e84828ee466406293be84f565a go1.2rc3
+94af58f9fd71feda5c316d791ed11aaf015f9e82 go1.2rc4