diff --git a/packages/codegen/src/templates/readme-template.handlebars b/packages/codegen/src/templates/readme-template.handlebars
index 29903561..ed58b1be 100644
--- a/packages/codegen/src/templates/readme-template.handlebars
+++ b/packages/codegen/src/templates/readme-template.handlebars
@@ -104,14 +104,6 @@ To enable GQL requests caching:
     yarn job-runner
     ```
 
-  * Run the server:
-
-    ```bash
-    yarn server
-    ```
-
-    GQL console: http://localhost:{{port}}/graphql
-
   * To watch a contract:
 
     ```bash
@@ -137,6 +129,14 @@ To enable GQL requests caching:
     yarn watch:contract --address MyProtocol --kind protocol --checkpoint true
     ```
 
+  * Run the server:
+
+    ```bash
+    yarn server
+    ```
+
+    GQL console: http://localhost:{{port}}/graphql
+
   * To fill a block range:
 
     ```bash
diff --git a/packages/codegen/src/visitor.ts b/packages/codegen/src/visitor.ts
index 88b6d858..6296848d 100644
--- a/packages/codegen/src/visitor.ts
+++ b/packages/codegen/src/visitor.ts
@@ -65,8 +65,9 @@ export class Visitor {
     const name = node.name;
     assert(name);
 
-    const params = node.parameters.map((item: any) => {
-      return { name: item.name, type: item.typeName.name };
+    const params = node.parameters.map((item: any, index: number) => {
+      const itemName = item.name ?? `arg${index}`;
+      return { name: itemName, type: item.typeName.name };
     });
 
     let errorMessage = '';