Index: src/OFData.h
==================================================================
--- src/OFData.h
+++ src/OFData.h
@@ -32,11 +32,11 @@
  * for OFData with item size 1.
  */
 @interface OFData: OFObject <OFCopying, OFMutableCopying, OFComparing,
     OFSerialization, OFMessagePackRepresentation>
 {
-	char *_items;
+	unsigned char *_items;
 	size_t _count, _itemSize;
 	bool _freeWhenDone;
 }
 
 /*!

Index: src/OFData.m
==================================================================
--- src/OFData.m
+++ src/OFData.m
@@ -183,11 +183,11 @@
 
 	@try {
 		if (itemSize == 0)
 			@throw [OFInvalidArgumentException exception];
 
-		_items = (char *)items;
+		_items = (unsigned char *)items;
 		_itemSize = itemSize;
 		_count = count;
 		_freeWhenDone = freeWhenDone;
 	} @catch (id e) {
 		[self release];