diff --git a/sonoff/language/tr-TR.h b/sonoff/language/tr-TR.h
index 0588b5175..af6d18082 100755
--- a/sonoff/language/tr-TR.h
+++ b/sonoff/language/tr-TR.h
@@ -110,6 +110,7 @@
 #define D_IP_ADDRESS "IP Adresi"
 #define D_LIGHT "Işık"
 #define D_LWT "LWT"
+#define D_MMHG "mmHg"
 #define D_MODULE "Modül"
 #define D_MQTT "MQTT"
 #define D_MULTI_PRESS "multi-press"