diff --git a/src/grpc.ts b/src/grpc.ts
index 5fde573d2..177781456 100644
--- a/src/grpc.ts
+++ b/src/grpc.ts
@@ -423,6 +423,9 @@ export class GrpcClient {
         }
         grpcOptions[key] = value as string | number;
       }
+      if (key.startsWith('grpc-node.')) {
+        grpcOptions[key] = value as string | number;
+      }
     });
     const stub = new CreateStub(
       serviceAddress,
diff --git a/test/unit/grpc.ts b/test/unit/grpc.ts
index 42f0b023f..56d0b36da 100644
--- a/test/unit/grpc.ts
+++ b/test/unit/grpc.ts
@@ -188,6 +188,7 @@ describe('grpc', () => {
         },
         'grpc.channelFactoryOverride': () => {},
         'grpc.gcpApiConfig': {},
+        'grpc-node.max_session_memory': 10,
       };
       // @ts-ignore
       return grpcClient.createStub(DummyStub, opts).then(stub => {
@@ -201,6 +202,7 @@ describe('grpc', () => {
           'callInvocationTransformer', // note: no grpc. prefix for grpc-gcp options
           'channelFactoryOverride',
           'gcpApiConfig',
+          'grpc-node.max_session_memory',
         ].forEach(k => {
           assert(stub.options.hasOwnProperty(k));
         });
@@ -214,6 +216,10 @@ describe('grpc', () => {
           (dummyStub.options['callInvocationTransformer'] as Function)(),
           42
         );
+        assert.strictEqual(
+          dummyStub.options['grpc-node.max_session_memory'],
+          10
+        );
         ['servicePath', 'port', 'other_dummy_options'].forEach(k => {
           assert.strictEqual(stub.options.hasOwnProperty(k), false);
         });