diff --git a/src/drivers/lis3mdl/lis3mdl_i2c.cpp b/src/drivers/lis3mdl/lis3mdl_i2c.cpp
index 7a2d6feb4b..5ef08d7159 100644
--- a/src/drivers/lis3mdl/lis3mdl_i2c.cpp
+++ b/src/drivers/lis3mdl/lis3mdl_i2c.cpp
@@ -112,9 +112,6 @@ LIS3MDL_I2C::ioctl(unsigned operation, unsigned &arg)
 	switch (operation) {
 
 	case MAGIOCGEXTERNAL:
-// On PX4v1 the MAG can be on an internal I2C
-// On everything else its always external
-#ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
 		if (_bus == PX4_I2C_BUS_EXPANSION) {
 			return 1;
 
@@ -122,10 +119,6 @@ LIS3MDL_I2C::ioctl(unsigned operation, unsigned &arg)
 			return 0;
 		}
 
-#else
-		return 1;
-#endif
-
 	case DEVIOCGDEVICEID:
 		return CDev::ioctl(nullptr, operation, arg);