@@ -17,11 +17,10 @@
 #include <stdarg.h>
 
 #import "OFObject.h"
 #import "OFCollection.h"
 
-@class OFMutableDictionary_hashtable;
 @class OFArray;
 
 #ifdef OF_HAVE_BLOCKS
 typedef void (^of_set_enumeration_block_t)(id object, BOOL *stop);
 typedef BOOL (^of_set_filter_block_t)(id object);
@@ -29,14 +28,10 @@
 
 /**
  * \brief An unordered set of unique objects.
  */
 @interface OFSet: OFObject <OFCollection, OFCopying, OFMutableCopying>
-{
-	OFMutableDictionary_hashtable *dictionary;
-}
-
 /**
  * \brief Returns a new, autoreleased set.
  *
  * \return A new, autoreleased set
  */
@@ -133,7 +128,10 @@
  * \return A new, autoreleased OFSet
  */
 - (OFSet*)filteredSetUsingBlock: (of_set_filter_block_t)block;
 #endif
 @end
+
+@interface OFSet_placeholder: OFSet
+@end
 
 #import "OFMutableSet.h"