diff --git a/.hgtags b/.hgtags
index 83542246b..0125a554a 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ b17f2928291eec5bf5b1c59a4a5fd583f704ac40 ns-3.0.12
 951296e9a277e14113a0d3ba86a9688b222569ae ns-3.1-RC2
 ea16c44eb90db579c83d3434fc8a960be506a7f5 ns-3.1-RC3
 42504fb1f7be7817b8be513cdcd3d9bc8f3660e8 ns-3.1
+5768685f9fdba9fbf2e9561a840f085142c73575 ns-3.1