diff --git a/html/includes/graphs/device/frequency.inc.php b/html/includes/graphs/device/frequency.inc.php
index b071b4bfd0..41cd6a772e 100644
--- a/html/includes/graphs/device/frequency.inc.php
+++ b/html/includes/graphs/device/frequency.inc.php
@@ -1,6 +1,6 @@
 <?php
 
-$class     = "freqquency";
+$class     = "frequency";
 $unit      = "Hz";
 $unit_long = "Hertz";