diff -r 90ad7324bbbc -r 1a9e6a5c1e79 dav/sync.h
--- a/dav/sync.h	Sun Apr 07 17:56:31 2019 +0200
+++ b/dav/sync.h	Tue Apr 09 18:19:52 2019 +0200
@@ -222,7 +222,7 @@
  * 
  * hashdata must be raw sha256 data and 32 bytes long
  */
-void sync_set_content_hash(DavResource *res, const char *hashdata);
+void sync_set_content_hash(DavResource *res, const unsigned char *hashdata);
 
 #ifdef	__cplusplus
 }