diff --git a/src/main/drivers/barometer/barometer_bmp085.h b/src/main/drivers/barometer/barometer_bmp085.h
index a750fb22fd..ca5ece069b 100644
--- a/src/main/drivers/barometer/barometer_bmp085.h
+++ b/src/main/drivers/barometer/barometer_bmp085.h
@@ -19,6 +19,8 @@
 
 #include "drivers/io_types.h"
 
+#define BMP085_I2C_ADDR         0x77
+
 typedef struct bmp085Config_s {
     ioTag_t xclrIO;
     ioTag_t eocIO;