diff --git a/Source/NSArchiver.m b/Source/NSArchiver.m
index d5fed59be..1302222b9 100644
--- a/Source/NSArchiver.m
+++ b/Source/NSArchiver.m
@@ -62,9 +62,16 @@ static Class NSArchiver_concrete_class;
   return self;
 }
 
+
+
 
 /* Archiving Data */
 
+- init
+{
+  return [self initForWritingWithMutableData: [[NSMutableData alloc] init]];
+}
+
 + (NSData*) archivedDataWithRootObject: (id)rootObject
 {
   id d = [[NSMutableData alloc] init];