diff --git a/.hgtags b/.hgtags
index 96c73596b10..32c5e085d21 100644
--- a/.hgtags
+++ b/.hgtags
@@ -36,3 +36,4 @@ fe9cc55b8db7f56f7e68a246acba363743854979 UPDATE_PACKAGING_R8
 6fd4bb500d425c406c1b52f66e5b195b20ae5e0a chromium-import-latest
 376b78fc72230aaf2ca4e279a8f4ef1efd4a1d9f GECKO_1_9_2_BASE
 138f593553b66c9f815e8f57870c19d6347f7702 UPDATE_PACKAGING_R9
+138f593553b66c9f815e8f57870c19d6347f7702 UPDATE_PACKAGING_R10