diff --git a/packages/extensions/openapi-to-typespec/src/utils/imports.ts b/packages/extensions/openapi-to-typespec/src/utils/imports.ts
index a8b7b34d84..1c95a93c74 100644
--- a/packages/extensions/openapi-to-typespec/src/utils/imports.ts
+++ b/packages/extensions/openapi-to-typespec/src/utils/imports.ts
@@ -7,15 +7,15 @@ export type Imports = {
 };
 
 export function getMainImports(program: TypespecProgram): Imports {
-  const modules = new Set<string>();
-  const namespaces = new Set<string>();
+  const modules: string[] = [];
+  const namespaces: string[] = [];
   if (program.serviceInformation.authentication?.some((a) => a.kind === "AadOauth2Auth")) {
-    modules.add(`import "@azure-tools/typespec-azure-core";`);
-    namespaces.add("using Azure.Core;");
+    modules.push(`import "@azure-tools/typespec-azure-core";`);
+    namespaces.push("using Azure.Core;");
   }
   return {
-    modules: [...modules],
-    namespaces: [...namespaces],
+    modules,
+    namespaces,
   };
 }