diff --git a/.hgtags b/.hgtags
index 51166b952732d9839ac1f46665f43d3fcfd23ae4..21dac82c44e56ac5bb28118a4de26cd63ee6d2cf 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ fcb923bad68e2b10380a030ea83a723f4dc3d4d6 jdk7-b47
 bcb33806d186561c781992e5f4d8a90bb033f9f0 jdk7-b48
 8b22ccb5aba2c6c11bddf6488a7bb7ef5b4bf2be jdk7-b49
 dae503d9f04c1a11e182dbf7f770509c28dc0609 jdk7-b50
+2581d90c6c9b2012da930eb4742add94a03069a0 jdk7-b51