diff --git a/src/if_py_both.h b/src/if_py_both.h
index 0620171..f843863 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -6772,6 +6772,7 @@
 	case VAR_INSTR:
 	case VAR_CLASS:
 	case VAR_OBJECT:
+	case VAR_TYPEALIAS:
 	    Py_INCREF(Py_None);
 	    return Py_None;
 	case VAR_BOOL: