diff --git a/sonoff/language/bg-BG.h b/sonoff/language/bg-BG.h
index a3ab3d539..ff7801984 100644
--- a/sonoff/language/bg-BG.h
+++ b/sonoff/language/bg-BG.h
@@ -502,6 +502,7 @@
 #define D_UNIT_CENTIMETER "cm"
 #define D_UNIT_HERTZ "Hz"
 #define D_UNIT_HOUR "h"
+#define D_UNIT_INCREMENTS "inc"
 #define D_UNIT_KILOOHM "kΩ"
 #define D_UNIT_KILOWATTHOUR "kWh"
 #define D_UNIT_LUX "lx"