diff --git a/.hgtags b/.hgtags
index ca060c1033..fd8d47458d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1615,3 +1615,4 @@ c7a1c91cd9befb627eb908965ae3a611b381c7ad NSS_3_53_BETA1
 52c965eaffa1272652a4ba765045b5193e586663 NSS_3_56_BETA1
 56224882ccc3c079fb22a8f2afedd1d56a0c199e NSS_3_57_BETA1
 57bbefa793232586d27cee83e74411171e128361 NSS_3_58_BETA1
+1f3db03bba0212027085e952ab78455784caced6 NSS_3_58_RTM