diff --git a/src/generate-services.ts b/src/generate-services.ts
index ec9a6a9b5..7a8b760df 100644
--- a/src/generate-services.ts
+++ b/src/generate-services.ts
@@ -72,15 +72,11 @@ export function generateService(
       params.push(code`metadata?: grpc.Metadata`);
     } else if (options.addGrpcMetadata) {
       const Metadata = imp("Metadata@@grpc/grpc-js");
-      const q = options.addNestjsRestParameter ? "" : "?";
-      params.push(code`metadata${q}: ${Metadata}`);
+      params.push(code`metadata?: ${Metadata}`);
     } else if (options.metadataType) {
       const Metadata = imp(options.metadataType);
       params.push(code`metadata?: ${Metadata}`);
     }
-    if (options.addNestjsRestParameter) {
-      params.push(code`...rest: any`);
-    }
 
     chunks.push(
       code`${methodDesc.formattedName}(${joinCode(params, { on: "," })}): ${responsePromiseOrObservable(
@@ -117,9 +113,11 @@ function generateRegularRpcMethod(ctx: Context, methodDesc: MethodDescriptorProt
   const params = [
     ...(options.context ? [code`ctx: Context`] : []),
     code`request: ${inputType}`,
+    ...(options.addGrpcMetadata ? [code`metadata?: Metadata`] : []),
     ...(options.useAbortSignal ? [code`abortSignal?: AbortSignal`] : []),
   ];
   const maybeCtx = options.context ? "ctx," : "";
+  const maybeMetadata = options.addGrpcMetadata ? "metadata," : "";
   const maybeAbortSignal = options.useAbortSignal ? "abortSignal || undefined," : "";
 
   let encode = code`${rawInputType}.encode(request).finish()`;
@@ -169,6 +167,7 @@ function generateRegularRpcMethod(ctx: Context, methodDesc: MethodDescriptorProt
         this.service,
         "${methodDesc.name}",
         data,
+        ${maybeMetadata}
         ${maybeAbortSignal}
       );
       return ${decode};
@@ -335,6 +334,7 @@ export function generateRpcType(ctx: Context, hasStreamingMethods: boolean): Cod
   const { options } = ctx;
   const maybeContext = options.context ? "<Context>" : "";
   const maybeContextParam = options.context ? "ctx: Context," : "";
+  const maybeMetadataParam = options.addGrpcMetadata ? `metadata?: Metadata,` : "";
   const maybeAbortSignalParam = options.useAbortSignal ? "abortSignal?: AbortSignal," : "";
   const methods = [[code`request`, code`Uint8Array`, code`Promise<Uint8Array>`]];
   if (hasStreamingMethods) {
@@ -356,6 +356,7 @@ export function generateRpcType(ctx: Context, hasStreamingMethods: boolean): Cod
         service: string,
         method: string,
         data: ${method[1]},
+        ${maybeMetadataParam}
         ${maybeAbortSignalParam}
       ): ${method[2]};`);
   });