@@ -465,11 +465,11 @@
 	     initWithStream: _stream
 		      entry: entry];
 
 	objc_autoreleasePoolPop(pool);
 
-	return [[_lastReturnedStream retain] autorelease];
+	return [[(OFStream *)_lastReturnedStream retain] autorelease];
 }
 
 - (OFStream *)streamForWritingEntry: (OFZIPArchiveEntry *)entry_
 {
 	/* TODO: Avoid data descriptor when _stream is an OFSeekableStream */
@@ -556,11 +556,11 @@
 	     initWithStream: _stream
 		      entry: entry];
 
 	objc_autoreleasePoolPop(pool);
 
-	return [[_lastReturnedStream retain] autorelease];
+	return [[(OFStream *)_lastReturnedStream retain] autorelease];
 }
 
 - (void)of_writeCentralDirectory
 {
 	void *pool = objc_autoreleasePoolPush();
@@ -603,11 +603,11 @@
 	[_stream writeLittleEndianInt16: 0xFFFF];	/* CD entries */
 	[_stream writeLittleEndianInt32: 0xFFFFFFFF];	/* CD size */
 	[_stream writeLittleEndianInt32: 0xFFFFFFFF];	/* CD offset */
 	[_stream writeLittleEndianInt16: [_archiveComment UTF8StringLength]];
 	if (_archiveComment != nil)
-		[_stream writeString: _archiveComment];
+		[_stream writeString: (OFString *)_archiveComment];
 
 	objc_autoreleasePoolPop(pool);
 }
 
 - (void)close