diff --git a/.hgtags b/.hgtags
index 8a62f3c0cb3..8f0fcecb739 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
+d3e973f1809606c67412361041ad197e50fe8cec jdk-9+166
 3965b747cfe1e6cbd66b8739da5a1ea6ec6985e9 jdk-9+165
 d16aebbb56d37f12e0c0b0a4fb427db65e1fb1a8 jdk-9+162
 18c41483a082e097ac2f5f983c1226ed94aa4215 jdk-9+163