diff --git a/custom_components/xiaomi_home/miot/specs/spec_modify.yaml b/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
index 48f1327..81a8cab 100644
--- a/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
+++ b/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
@@ -205,6 +205,7 @@ urn:miot-spec-v2:device:hood:0000A01B:cykj-jyj22:2: urn:miot-spec-v2:device:hood
 urn:miot-spec-v2:device:hood:0000A01B:cykj-jyj22:3:
   prop.3.1:
     name: on-ventilation
+urn:miot-spec-v2:device:hood:0000A01B:cykj-jyj22:4: urn:miot-spec-v2:device:hood:0000A01B:cykj-jyj22:3
 urn:miot-spec-v2:device:humidifier:0000A00E:zhimi-ca4:2:
   prop.2.7:
     unit: percentage