@@ -116,11 +116,11 @@
 	self = [super init];
 
 	@try {
 		_iVarsData = [[OFSecureData alloc]
 		    initWithCount: sizeof(*_iVars)];
-		_iVars = [_iVarsData items];
+		_iVars = _iVarsData.mutableItems;
 
 		[self of_resetState];
 	} @catch (id e) {
 		[self release];
 		@throw e;
@@ -144,11 +144,11 @@
 - (id)copy
 {
 	OFSHA1Hash *copy = [[OFSHA1Hash alloc] of_init];
 
 	copy->_iVarsData = [_iVarsData copy];
-	copy->_iVars = [copy->_iVarsData items];
+	copy->_iVars = copy->_iVarsData.mutableItems;
 	copy->_calculated = _calculated;
 
 	return copy;
 }