diff --git a/idl/idl_api.ysl2 b/idl/idl_api.ysl2
index 532ce83..a93ecac 100644
--- a/idl/idl_api.ysl2
+++ b/idl/idl_api.ysl2
@@ -90,7 +90,7 @@ def "func:idl_type_get_resolved_type" {
 
     choose {
         when "$idltypekind = 'deftype'"
-            result "func:idl_type_get_type_of_deftype($idltype)";
+            result "func:idl_type_get_resolved_type(func:idl_type_get_type_of_deftype($idltype))";
         otherwise
             result "$idltype";
     }