@@ -17,11 +17,11 @@
 #include "config.h"
 
 #import "OFNull.h"
 #import "OFString.h"
 #import "OFXMLElement.h"
-#import "OFDataArray.h"
+#import "OFData.h"
 
 #import "OFInvalidArgumentException.h"
 
 @interface OFNull ()
 - (OFString *)of_JSONRepresentationWithOptions: (int)options
@@ -99,19 +99,16 @@
 					 depth: (size_t)depth
 {
 	return @"null";
 }
 
-- (OFDataArray *)messagePackRepresentation
+- (OFData *)messagePackRepresentation
 {
-	OFDataArray *data = [OFDataArray dataArrayWithItemSize: 1
-						      capacity: 1];
 	uint8_t type = 0xC0;
 
-	[data addItem: &type];
-
-	return data;
+	return [OFData dataWithItems: &type
+			       count: 1];
 }
 
 - autorelease
 {
 	return self;