diff --git a/sonoff/language/pt-PT.h b/sonoff/language/pt-PT.h
index 97750f38c..9247a62ad 100644
--- a/sonoff/language/pt-PT.h
+++ b/sonoff/language/pt-PT.h
@@ -110,6 +110,7 @@
 #define D_IP_ADDRESS "Endereço IP"
 #define D_LIGHT "Luz"
 #define D_LWT "LWT"
+#define D_MMHG "mmHg"
 #define D_MODULE "Módulo"
 #define D_MQTT "MQTT"
 #define D_MULTI_PRESS "multi-pressão"