@@ -305,11 +305,11 @@
 	if (!of_tlskey_set(threadSelfKey, mainThread))
 		@throw [OFInitializationFailedException
 		    exceptionWithClass: self];
 }
 
-- init
+- (instancetype)init
 {
 	self = [super init];
 
 	@try {
 		if (!of_thread_attr_init(&_attr))
@@ -322,11 +322,11 @@
 
 	return self;
 }
 
 # ifdef OF_HAVE_BLOCKS
-- initWithThreadBlock: (of_thread_block_t)threadBlock
+- (instancetype)initWithThreadBlock: (of_thread_block_t)threadBlock
 {
 	self = [self init];
 
 	@try {
 		_threadBlock = [threadBlock copy];
@@ -385,11 +385,11 @@
 	_running = OF_THREAD_NOT_RUNNING;
 
 	return _returnValue;
 }
 
-- copy
+- (id)copy
 {
 	return [self retain];
 }
 
 - (OFRunLoop *)runLoop
@@ -458,11 +458,11 @@
 # endif
 
 	[super dealloc];
 }
 #else
-- init
+- (instancetype)init
 {
 	OF_INVALID_INIT_METHOD
 }
 #endif
 @end