@@ -79,11 +79,11 @@
  *
  * @param stream The underlying stream to which compressed data is written or
  *		 from which compressed data is read
  * @return A new, autoreleased OFInflateStream
  */
-+ (instancetype)streamWithStream: (OFStream *)stream;
++ (instancetype)streamWithStream: (OF_KINDOF(OFStream *))stream;
 
 - (instancetype)init OF_UNAVAILABLE;
 
 /*!
  * @brief Initializes an already allocated OFInflateStream with the specified
@@ -91,9 +91,10 @@
  *
  * @param stream The underlying stream to which compressed data is written or
  *		 from which compressed data is read
  * @return A initialized OFInflateStream
  */
-- (instancetype)initWithStream: (OFStream *)stream OF_DESIGNATED_INITIALIZER;
+- (instancetype)initWithStream: (OF_KINDOF(OFStream *))stream
+    OF_DESIGNATED_INITIALIZER;
 @end
 
 OF_ASSUME_NONNULL_END