Index: utils/OFZIP.m
==================================================================
--- utils/OFZIP.m
+++ utils/OFZIP.m
@@ -252,11 +252,11 @@
 			[of_stdout writeFormat: @"Extracting %@...", fileName];
 		}
 
 		stream = [archive streamForReadingFile: fileName];
 		output = [OFFile fileWithPath: outFileName
-					 mode: @"w"];
+					 mode: @"wb"];
 
 		while (![stream isAtEndOfStream]) {
 			size_t length = [stream readIntoBuffer: buffer
 							length: BUFFER_SIZE];
 			[output writeBuffer: buffer