diff --git a/include/dap/optional.h b/include/dap/optional.h
index 7e1d283..9a3d216 100644
--- a/include/dap/optional.h
+++ b/include/dap/optional.h
@@ -75,7 +75,7 @@ class optional {
   inline T& operator*();
 
  private:
-  T val = {};
+  T val{};
   bool set = false;
 };