diff --git a/src/gen_rules.ml b/src/gen_rules.ml
index cae714b3..18b7479f 100644
--- a/src/gen_rules.ml
+++ b/src/gen_rules.ml
@@ -38,6 +38,7 @@ module Ocaml_flags = struct
       ; "-strict-sequence"
       ; "-strict-formats"
       ; "-short-paths"
+      ; "-keep-locs"
       ]
     else
       [ "-w"; !Clflags.warnings ]