diff --git a/homeassistant/components/mqtt/abbreviations.py b/homeassistant/components/mqtt/abbreviations.py
index 4b4c6fb7af9..c98dbbd270a 100644
--- a/homeassistant/components/mqtt/abbreviations.py
+++ b/homeassistant/components/mqtt/abbreviations.py
@@ -50,6 +50,7 @@ ABBREVIATIONS = {
     "dock_tpl": "docked_template",
     "e": "encoding",
     "en": "enabled_by_default",
+    "ent_cat": "entity_category",
     "err_t": "error_topic",
     "err_tpl": "error_template",
     "fanspd_t": "fan_speed_topic",