diff --git a/include/pybind11/pybind11.h b/include/pybind11/pybind11.h
index a94f6f0f1..0b4f46f6d 100644
--- a/include/pybind11/pybind11.h
+++ b/include/pybind11/pybind11.h
@@ -493,7 +493,7 @@ protected:
                 } else {
                     std::string tname(t->name());
                     detail::clean_type_id(tname);
-                    signature += tname;
+                    signature += "Annotated[Any, \"" + tname + "\"]";
                 }
             } else {
                 signature += c;