diff --git a/packages/proto-loader/bin/proto-loader-gen-types.ts b/packages/proto-loader/bin/proto-loader-gen-types.ts
index 83a91c8e..0d71e549 100644
--- a/packages/proto-loader/bin/proto-loader-gen-types.ts
+++ b/packages/proto-loader/bin/proto-loader-gen-types.ts
@@ -520,7 +520,7 @@ function generateServiceHandlerInterface(formatter: TextFormatter, serviceType:
         formatter.writeLine(`${methodName}(call: grpc.ServerDuplexStream<${requestType}, ${responseType}>): void;`);
       } else {
         // Client streaming
-        formatter.writeLine(`${methodName}(call: grpc.ServerReadableStream<${requestType}>, callback: grpc.sendUnaryData<${responseType}>): void;`);
+        formatter.writeLine(`${methodName}(call: grpc.ServerReadableStream<${requestType}, ${responseType}>, callback: grpc.sendUnaryData<${responseType}>): void;`);
       }
     } else {
       if (method.responseStream) {
diff --git a/packages/proto-loader/package.json b/packages/proto-loader/package.json
index 99443d71..5751b4ba 100644
--- a/packages/proto-loader/package.json
+++ b/packages/proto-loader/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grpc/proto-loader",
-  "version": "0.6.0-pre13",
+  "version": "0.6.0-pre14",
   "author": "Google Inc.",
   "contributors": [
     {