diff --git a/sledge/dune b/sledge/dune
index 6302f4bba..9ab830dc8 100644
--- a/sledge/dune
+++ b/sledge/dune
@@ -6,7 +6,7 @@
 (env
  (debug
   (flags
-   (-w +a-4-9-18-40-42-44-48@50-66 -strict-formats -strict-sequence
+   (-w +a-4-9-18-30-40-42-44-48@50-66 -strict-formats -strict-sequence
      -error-style short -short-paths -bin-annot -keep-locs -keep-docs -opaque))
   (env-vars
    (PPX_TRACE_ENABLED 1))