diff -r a2fc5b1cd476 -r 29b979ca8750 dav/pwd.c
--- a/dav/pwd.c	Sat Oct 20 13:33:46 2018 +0200
+++ b/dav/pwd.c	Sat Oct 20 13:46:32 2018 +0200
@@ -82,7 +82,7 @@
     PWDS_VERSION(p) = 1;
     PWDS_ENC(p) = DAV_KEY_AES256;
     PWDS_PWFUNC(p) = DAV_PWFUNC_PBKDF2_SHA256;
-    dav_rand_bytes(p->content->space+4, 16);
+    dav_rand_bytes((unsigned char*)p->content->space+4, 16);
     p->isdecrypted = 1;
     p->encoffset = PWDS_HEADER_SIZE;
     return p;