diff --git a/html/includes/graphs/device/siklu_rfOperationalFrequency.inc.php b/html/includes/graphs/device/siklu_rfOperationalFrequency.inc.php
index 03de5fcc6..6f0ac1289 100644
--- a/html/includes/graphs/device/siklu_rfOperationalFrequency.inc.php
+++ b/html/includes/graphs/device/siklu_rfOperationalFrequency.inc.php
@@ -7,7 +7,7 @@ $rrdfilename  = $config['rrd_dir'] . "/".$device['hostname']."/siklu-wireless.rr
 if (file_exists($rrdfilename)) {
     $rrd_options .= " COMMENT:'Hz                        Now    Min     Max\\n'";
     $rrd_options .= " DEF:rfOperFreq=".$rrdfilename.":rfOperFreq:AVERAGE ";
-    $rrd_options .= " LINE1:rfOperFreq#CC0000:'RSSI                 ' ";
+    $rrd_options .= " LINE1:rfOperFreq#CC0000:'GHz                 ' ";
     $rrd_options .= " GPRINT:rfOperFreq:LAST:%3.2lf ";
     $rrd_options .= " GPRINT:rfOperFreq:MIN:%3.2lf ";
     $rrd_options .= " GPRINT:rfOperFreq:MAX:%3.2lf\\\l ";