diff --git a/includes/discovery/processors-hrdevice.inc.php b/includes/discovery/processors-hrdevice.inc.php
index 25fffe736..070862e5c 100755
--- a/includes/discovery/processors-hrdevice.inc.php
+++ b/includes/discovery/processors-hrdevice.inc.php
@@ -22,7 +22,7 @@
 
         if($debug) { echo("$old_rrd $new_rrd"); }
         if (is_file($old_rrd)) {
-          shell_exec("mv -f $old_rrd $new_rrd");
+          rename($old_rrd,$new_rrd);
           echo("Moved RRD ");
         }