diff --git a/.hgtags b/.hgtags
index a9215037ec..e8e5055e0a 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1612,3 +1612,4 @@ c7a1c91cd9befb627eb908965ae3a611b381c7ad NSS_3_53_BETA1
 8fe22033a88e7fb75d451455ca841017ce50f9c1 NSS_3_53_BETA2
 2bd2f3267dc5e96aabe1145d698a817f37bc8f4c NSS_3_54_BETA1
 0768baa431e720672263deaee5b1409fbce93fdd NSS_3_55_BETA1
+6705eec655c8237635f7dc830d743b26a7124650 NSS_3_55_RTM