Index: src/OFPair.m
==================================================================
--- src/OFPair.m
+++ src/OFPair.m
@@ -98,15 +98,15 @@
 	return [self retain];
 }
 
 - mutableCopy
 {
-	return [OFMutablePair pairWithFirstObject: _firstObject
-				     secondObject: _secondObject];
+	return [[OFMutablePair alloc] initWithFirstObject: _firstObject
+					     secondObject: _secondObject];
 }
 
 - (OFString *)description
 {
 	return [OFString stringWithFormat: @"<<%@, %@>>",
 					   _firstObject, _secondObject];
 }
 @end

Index: src/OFTriple.m
==================================================================
--- src/OFTriple.m
+++ src/OFTriple.m
@@ -112,17 +112,17 @@
 	return [self retain];
 }
 
 - mutableCopy
 {
-	return [OFMutableTriple tripleWithFirstObject: _firstObject
-					 secondObject: _secondObject
-					  thirdObject: _thirdObject];
+	return [[OFMutableTriple alloc] initWithFirstObject: _firstObject
+					       secondObject: _secondObject
+						thirdObject: _thirdObject];
 }
 
 - (OFString *)description
 {
 	return [OFString stringWithFormat: @"<<%@, %@, %@>>",
 					   _firstObject, _secondObject,
 					   _thirdObject];
 }
 @end