diff --git a/Source/GSRunLoopWatcher.m b/Source/GSRunLoopWatcher.m
index 104018e..3daf9ad 100644
--- a/Source/GSRunLoopWatcher.m
+++ b/Source/GSRunLoopWatcher.m
@@ -125,13 +125,14 @@ static GSDispatchWatcher* _dispatchWatcherSharedInstance;
 
   if (_dispatchWatcherSharedInstance == nil)
     {
+      // assignment and return on first allocation
       _dispatchWatcherSharedInstance = [super allocWithZone:zone];
-      return _dispatchWatcherSharedInstance;  // assignment and return on first allocation
+      return _dispatchWatcherSharedInstance;
     }
-  return nil; //on subsequent allocation attempts return nil
+  return nil; // on subsequent allocation attempts return nil
 }
 
-- (id)copyWithZone:(NSZone *)zone
+- (id)copyWithZone:(NSZone *) __attribute__((unused)) zone
 {
   return self;
 }
@@ -143,12 +144,12 @@ static GSDispatchWatcher* _dispatchWatcherSharedInstance;
 
 - (NSUInteger)retainCount
 {
-  return UINT_MAX;  //denotes an object that cannot be released
+  return UINT_MAX; // denotes an object that cannot be released
 }
 
 - (oneway void)release
 {
-  //do nothing
+  // do nothing
 }
 
 - (id)autorelease