diff --git a/lib/Report/Bandwidth.php b/lib/Report/Bandwidth.php
index 3fb2bc333f..2d18f37f46 100644
--- a/lib/Report/Bandwidth.php
+++ b/lib/Report/Bandwidth.php
@@ -255,7 +255,7 @@ public function getResults(SanitizerInterface $sanitizedParams)
             $params['displayid'] = $displayId;
         }
 
-        $SQL .= 'GROUP BY display.display ';
+        $SQL .= 'GROUP BY display.displayId, display.display ';
 
         if ($displayId != 0) {
             $SQL .= ' , bandwidthtype.name ';