Index: src/OFMutableDictionary.m
==================================================================
--- src/OFMutableDictionary.m
+++ src/OFMutableDictionary.m
@@ -64,11 +64,11 @@
 	va_end(arguments);
 
 	return ret;
 }
 
-- initWithKey: (id <OFCopying>)firstKey
+- initWithKey: (id)firstKey
     arguments: (va_list)arguments
 {
 	return (id)[[OFMutableDictionary_hashtable alloc]
 	    initWithKey: firstKey
 	      arguments: arguments];
@@ -128,17 +128,17 @@
 
 	return [super init];
 }
 
 - (void)setObject: (id)object
-	   forKey: (id <OFCopying>)key
+	   forKey: (id)key
 {
 	@throw [OFNotImplementedException newWithClass: isa
 					      selector: _cmd];
 }
 
-- (void)removeObjectForKey: (id <OFCopying>)key
+- (void)removeObjectForKey: (id)key
 {
 	@throw [OFNotImplementedException newWithClass: isa
 					      selector: _cmd];
 }