diff --git a/lib/modules.nix b/lib/modules.nix
index 1adee44f7a33..2820aa921bf2 100644
--- a/lib/modules.nix
+++ b/lib/modules.nix
@@ -1158,8 +1158,10 @@ let
       value = if opt ? apply then opt.apply res.mergedValue else res.mergedValue;
 
       warnDeprecation =
-        warnIf (opt.type.deprecationMessage != null)
-          "The type `types.${opt.type.name}' of option `${showOption loc}' defined in ${showFiles opt.declarations} is deprecated. ${opt.type.deprecationMessage}";
+        if (opt.type.deprecationMessage != null) then
+          warn "The type `types.${opt.type.name}' of option `${showOption loc}' defined in ${showFiles opt.declarations} is deprecated. ${opt.type.deprecationMessage}"
+        else
+          x: x;
 
     in
     warnDeprecation opt