diff --git a/peglib.h b/peglib.h
index 30ff2c2..1089046 100644
--- a/peglib.h
+++ b/peglib.h
@@ -193,7 +193,7 @@ private:
 };
 
 template <typename EF>
-auto make_scope_exit(EF&& exit_function) {
+auto make_scope_exit(EF&& exit_function) -> scope_exit<EF> {
     return scope_exit<std::remove_reference_t<EF>>(std::forward<EF>(exit_function));
 }