diff --git a/.hgtags b/.hgtags
index d8d32b5c5..d95f8ddd0 100644
--- a/.hgtags
+++ b/.hgtags
@@ -67,3 +67,4 @@ ae540de68a2534213342c5e0b12afb47d7518a90 ns-3.14
 b4a70b99171ade6e9628a87780994238950a1df1 ns-3.17
 cfbc9491d7e7c9d346cc042fd35b8afb8836e81f ns-3.18
 322102df792e2be6c74df74f776b3470fb1db795 ns-3.19
+da0eb48df23f96335f32a37f047a6bc27e197c8d ns-3.20