@@ -78,30 +78,30 @@
 /*!
  * @brief Initializes an already allocated OFMutableData with an item size of 1.
  *
  * @return An initialized OFMutableData
  */
-- init;
+- (instancetype)init;
 
 /*!
  * @brief Initializes an already allocated OFMutableData whose items all have
  *	  the same size.
  *
  * @param itemSize The size of a single element in the OFMutableData
  * @return An initialized OFMutableData
  */
-- initWithItemSize: (size_t)itemSize;
+- (instancetype)initWithItemSize: (size_t)itemSize;
 
 /*!
  * @brief Initializes an already allocated OFMutableData with enough memory to
  *	  hold the the specified number of items which all have an item size of
  *	  1.
  *
  * @param capacity The initial capacity for the OFMutableData
  * @return An initialized OFMutableData
  */
-- initWithCapacity: (size_t)capacity;
+- (instancetype)initWithCapacity: (size_t)capacity;
 
 /*!
  * @brief Initializes an already allocated OFMutableData with enough memory to
  *	  hold the the specified number of items which all have the same
  *	  specified size.
@@ -108,20 +108,20 @@
  *
  * @param itemSize The size of a single element in the OFMutableData
  * @param capacity The initial capacity for the OFMutableData
  * @return An initialized OFMutableData
  */
-- initWithItemSize: (size_t)itemSize
-	  capacity: (size_t)capacity;
-
-- initWithItemsNoCopy: (const void *)items
-		count: (size_t)count
-	 freeWhenDone: (bool)freeWhenDone OF_UNAVAILABLE;
-- initWithItemsNoCopy: (const void *)items
-	     itemSize: (size_t)itemSize
-		count: (size_t)count
-	 freeWhenDone: (bool)freeWhenDone OF_UNAVAILABLE;
+- (instancetype)initWithItemSize: (size_t)itemSize
+			capacity: (size_t)capacity;
+
+- (instancetype)initWithItemsNoCopy: (const void *)items
+			      count: (size_t)count
+		       freeWhenDone: (bool)freeWhenDone OF_UNAVAILABLE;
+- (instancetype)initWithItemsNoCopy: (const void *)items
+			   itemSize: (size_t)itemSize
+			      count: (size_t)count
+		       freeWhenDone: (bool)freeWhenDone OF_UNAVAILABLE;
 
 /*!
  * @brief Adds an item to the OFMutableData.
  *
  * @param item A pointer to an arbitrary item