1 files changed, 3 insertions, 2 deletions
diff --git a/Foundation/GTMObjectSingleton.h b/Foundation/GTMObjectSingleton.h
index 4763b68..e6ef28e 100644
--- a/Foundation/GTMObjectSingleton.h
+++ b/Foundation/GTMObjectSingleton.h
@@ -7,9 +7,9 @@
 //  Licensed under the Apache License, Version 2.0 (the "License"); you may not
 //  use this file except in compliance with the License.  You may obtain a copy
 //  of the License at
-// 
+//
 //  http://www.apache.org/licenses/LICENSE-2.0
-// 
+//
 //  Unless required by applicable law or agreed to in writing, software
 //  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 //  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
@@ -66,6 +66,7 @@ static _object_name_ *z##_shared_obj_name_ = nil;  \
   return self;                                     \
 }                                                  \
 - (id)copyWithZone:(NSZone *)zone {                \
+  GTM_UNUSED(zone);                                \
   return self;                                     \
 }                                                  \