diff --git a/src/drivers/barometer/ms5611/ms5611.cpp b/src/drivers/barometer/ms5611/ms5611.cpp
index eb14f5a1f9..1571b3a839 100644
--- a/src/drivers/barometer/ms5611/ms5611.cpp
+++ b/src/drivers/barometer/ms5611/ms5611.cpp
@@ -872,7 +872,7 @@ struct ms5611_bus_option {
 #ifdef PX4_I2C_BUS_EXPANSION1
 	{ MS5611_BUS_I2C_EXTERNAL, "/dev/ms5611_ext1", &MS5611_i2c_interface, PX4_I2C_BUS_EXPANSION1, NULL },
 #endif
-#ifdef PX4_I2C_BUS_EXPANSION
+#ifdef PX4_I2C_BUS_EXPANSION2
 	{ MS5611_BUS_I2C_EXTERNAL, "/dev/ms5611_ext2", &MS5611_i2c_interface, PX4_I2C_BUS_EXPANSION2, NULL },
 #endif
 };