@@ -21,12 +21,13 @@
 #import "OFData.h"
 
 #import "OFInvalidArgumentException.h"
 
 @interface OFNull ()
-- (OFString *)of_JSONRepresentationWithOptions: (int)options
-					 depth: (size_t)depth;
+- (OFString *)
+    of_JSONRepresentationWithOptions: (OFJSONRepresentationOptions)options
+			       depth: (size_t)depth;
 @end
 
 static OFNull *null = nil;
 
 @implementation OFNull
@@ -85,16 +86,18 @@
 - (OFString *)JSONRepresentation
 {
 	return [self of_JSONRepresentationWithOptions: 0 depth: 0];
 }
 
-- (OFString *)JSONRepresentationWithOptions: (int)options
+- (OFString *)JSONRepresentationWithOptions:
+    (OFJSONRepresentationOptions)options
 {
 	return [self of_JSONRepresentationWithOptions: options depth: 0];
 }
 
-- (OFString *)of_JSONRepresentationWithOptions: (int)options
+- (OFString *)
+    of_JSONRepresentationWithOptions: (OFJSONRepresentationOptions)options
 					 depth: (size_t)depth
 {
 	return @"null";
 }