diff --git a/sources/shiboken6/libshiboken/signature/signature_extend.cpp b/sources/shiboken6/libshiboken/signature/signature_extend.cpp
index ca560d00f..7292f8216 100644
--- a/sources/shiboken6/libshiboken/signature/signature_extend.cpp
+++ b/sources/shiboken6/libshiboken/signature/signature_extend.cpp
@@ -77,7 +77,7 @@ PyObject *pyside_md_get___signature__(PyObject *ob_md, PyObject *modifier)
 {
     AutoDecRef func(name_key_to_func(ob_md));
     if (func.object() == Py_None)
-        return Py_None;
+        Py_RETURN_NONE;
     if (func.isNull())
         Py_FatalError("missing mapping in MethodDescriptor");
     return pyside_cf_get___signature__(func, modifier);