@@ -76,10 +76,15 @@
 - initWithSerialization: (OFXMLElement*)element
 {
 	return (id)[[OFMutableSet_hashtable alloc]
 	    initWithSerialization: element];
 }
+
+- initWithCapacity: (size_t)capacity
+{
+	return (id)[[OFMutableSet_hashtable alloc] initWithCapacity: capacity];
+}
 
 - retain
 {
 	return self;
 }
@@ -114,10 +119,15 @@
 	if (self == [OFMutableSet class])
 		return (id)&placeholder;
 
 	return [super alloc];
 }
+
++ (instancetype)setWithCapacity: (size_t)capacity
+{
+	return [[[self alloc] initWithCapacity: capacity] autorelease];
+}
 
 - init
 {
 	if (object_getClass(self) == [OFMutableSet class]) {
 		@try {
@@ -129,10 +139,15 @@
 		}
 	}
 
 	return [super init];
 }
+
+- initWithCapacity: (size_t)capacity
+{
+	OF_INVALID_INIT_METHOD
+}
 
 - (void)addObject: (id)object
 {
 	OF_UNRECOGNIZED_SELECTOR
 }