diff --git a/modules/csync_owncloud.c b/modules/csync_owncloud.c
index afb9daec6..64f293d0f 100644
--- a/modules/csync_owncloud.c
+++ b/modules/csync_owncloud.c
@@ -1553,7 +1553,7 @@ static int owncloud_utimes(const char *uri, const struct timeval *times) {
         errno = EACCES;
         return -1; /* FIXME: Find good errno */
     }
-    pname.nspace = NULL;
+    pname.nspace = "DAV:";
     pname.name = "lastmodified";
 
     newmodtime = modtime->tv_sec;