diff --git a/src/objective-c/GRPCClient/ProtoMethod.h b/src/objective-c/GRPCClient/ProtoMethod.h
index 814c15646410c0bd9ccbb70bc22c9b222357ab2a..86d582a03e5cff48ef7a6dd4dae60c94bbee39e7 100644
--- a/src/objective-c/GRPCClient/ProtoMethod.h
+++ b/src/objective-c/GRPCClient/ProtoMethod.h
@@ -38,10 +38,9 @@
 // A fully-qualified gRPC method name. Full qualification is needed because a gRPC endpoint can
 // implement multiple interfaces.
 // TODO(jcanizales): Move to ProtoRPC package.
-// TODO(jcanizales): Rename interface -> service.
 @interface ProtoMethod : NSObject
 @property(nonatomic, readonly) NSString *package;
-@property(nonatomic, readonly) NSString *interface;
+@property(nonatomic, readonly) NSString *service;
 @property(nonatomic, readonly) NSString *method;
 - (instancetype)initWithPackage:(NSString *)package
                       interface:(NSString *)interface
diff --git a/src/objective-c/GRPCClient/ProtoMethod.m b/src/objective-c/GRPCClient/ProtoMethod.m
index 1f5f836b7d06b49b843faeee467fbe792a233908..4c78b4f61c7c1fa6c402003bb7b180b9daaab5c4 100644
--- a/src/objective-c/GRPCClient/ProtoMethod.m
+++ b/src/objective-c/GRPCClient/ProtoMethod.m
@@ -39,7 +39,7 @@
                          method:(NSString *)method {
   if ((self = [super init])) {
     _package = [package copy];
-    _interface = [interface copy];
+    _service = [interface copy];
     _method = [method copy];
   }
   return self;
diff --git a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m b/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m
index f31d33408b041f94ff44f4e5e4fea92e7df83fff..cb4efc82cfdab78baa1f99c2400bc7396ab3755f 100644
--- a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m
+++ b/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m
@@ -36,9 +36,9 @@
 @implementation ProtoMethod (HTTP2Encoding)
 - (NSString *)HTTP2Path {
   if (self.package) {
-    return [NSString stringWithFormat:@"/%@.%@/%@", self.package, self.interface, self.method];
+    return [NSString stringWithFormat:@"/%@.%@/%@", self.package, self.service, self.method];
   } else {
-    return [NSString stringWithFormat:@"/%@/%@", self.interface, self.method];
+    return [NSString stringWithFormat:@"/%@/%@", self.service, self.method];
   }
 }
 @end