diff --git a/_tags b/_tags
index acfe0b21..a5e1a655 100644
--- a/_tags
+++ b/_tags
@@ -13,6 +13,6 @@
 
 # more warnings
 <**/*.ml>: warn_K, warn_Y, warn_X
-<**/*.ml>: keep_locks, short_paths, safe_string, strict_sequence
+<**/*.ml>: short_paths, safe_string, strict_sequence
 <**/*.cm*>: debug