diff --git a/pkgs/development/tools/ocaml/findlib/default.nix b/pkgs/development/tools/ocaml/findlib/default.nix
index bcadfbc660ad..ac4050d9f283 100644
--- a/pkgs/development/tools/ocaml/findlib/default.nix
+++ b/pkgs/development/tools/ocaml/findlib/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
       if [[ -n "$conflict" ]]; then
         echo "Conflicting ocaml packages detected";
         echo "$conflict"
-        echo "Set dontDetectOcamlConflicts to false to disable this check."
+        echo "Set dontDetectOcamlConflicts to true to disable this check."
         exit 1
       fi
     }