diff --git a/lib/jrpc.js b/lib/jrpc.js
index 396f346..8fa71eb 100755
--- a/lib/jrpc.js
+++ b/lib/jrpc.js
@@ -9905,7 +9905,7 @@ function get_ir(parsed) {
           throw new IRError(field, "Invalid statement!");
         }
         if (defined.indexOf(field.fieldtype) < 0) {
-          if (builtin.indexOf(field.fieldtype) < 0) {
+          if (builtin.indexOf(field.fieldtype) < 0 && field.fieldtype !== field.name) {
             throw new IRError(field, `Type ${field.fieldtype} is not defined!`);
           }
         } else {
diff --git a/package.json b/package.json
index e00869e..6c116e3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/jrpcgen",
-   "version": "1.0.24",
+   "version": "1.0.25",
    "main": "lib/index.js",
    "license": "MIT",
    "packageManager": "yarn@3.1.1",
diff --git a/src/ir.ts b/src/ir.ts
index bbb1399..72fe9bb 100644
--- a/src/ir.ts
+++ b/src/ir.ts
@@ -101,7 +101,7 @@ export default function get_ir(parsed: Parsed): IR {
             }
 
             if (defined.indexOf(field.fieldtype) < 0) {
-               if (builtin.indexOf(field.fieldtype) < 0) {
+               if (builtin.indexOf(field.fieldtype) < 0 && field.fieldtype !== field.name) {
                   throw new IRError(
                      field,
                      `Type ${field.fieldtype} is not defined!`