diff --git a/src/common/const.ts b/src/common/const.ts
index d75aa3f3dc..fb5ee730f9 100644
--- a/src/common/const.ts
+++ b/src/common/const.ts
@@ -119,6 +119,7 @@ export const FIXED_DEVICE_CLASS_ICONS = {
   current: mdiCurrentAc,
   date: mdiCalendar,
   energy: mdiLightningBolt,
+  frequency: mdiSineWave,
   gas: mdiGasCylinder,
   humidity: mdiWaterPercent,
   illuminance: mdiBrightness5,