diff --git a/.hgtags b/.hgtags
index fe5aa3732f..5e6e5af1de 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ fd11abb781d777f1e0e97d7566a541b6adb12321 5.6.0
 3e261884cfc342f9af6527162c804eae3990006a 5.8.0
 201938015dab5f5c3e45f8e38096d6fb7a6a439c 6.0.0
 1cea363e1a055df3a2d739ee7165cb12f4e0da74 6.2.0
+d3d5f56b3c5859b3a6c742d4639680ac8dbfdca0 6.4.0