diff --git a/packages/protobuf/src/codegen-info.ts b/packages/protobuf/src/codegen-info.ts
index bf3ebeec0..fd1776c73 100644
--- a/packages/protobuf/src/codegen-info.ts
+++ b/packages/protobuf/src/codegen-info.ts
@@ -29,7 +29,7 @@ import type {
   DescMethod,
   DescOneof,
   DescService,
-} from "./descriptor-set";
+} from "./descriptor-set.js";
 import { LongType, ScalarType } from "./field.js";
 
 interface CodegenInfo {