diff --git a/libraries/AP_HAL/board/linux.h b/libraries/AP_HAL/board/linux.h
index 0c2d892977..f507175afa 100644
--- a/libraries/AP_HAL/board/linux.h
+++ b/libraries/AP_HAL/board/linux.h
@@ -389,7 +389,7 @@
 #endif
 
 #ifndef HAL_LINUX_I2C_INTERNAL_BUS_MASK
-#define HAL_LINUX_I2C_INTERNAL_BUS_MASK 0x01
+#define HAL_LINUX_I2C_INTERNAL_BUS_MASK 0xFFFF
 #endif
 
 #ifndef HAL_LINUX_I2C_EXTERNAL_BUS_MASK