@@ -13,11 +13,15 @@
 
 /**
  * The OFMutableArray class is a class for storing, adding and removing objects
  * in an array.
  */
-@interface OFMutableArray: OFArray {}
+@interface OFMutableArray: OFArray
+{
+	unsigned long mutations;
+}
+
 /**
  * Adds an object to the OFArray.
  *
  * \param obj An object to add
  */