diff --git a/boards/px4/fmu-v5/src/i2c.cpp b/boards/px4/fmu-v5/src/i2c.cpp
index 63e1172b7b..b7d838eb62 100644
--- a/boards/px4/fmu-v5/src/i2c.cpp
+++ b/boards/px4/fmu-v5/src/i2c.cpp
@@ -34,9 +34,9 @@
 #include <px4_arch/i2c_hw_description.h>
 
 constexpr px4_i2c_bus_t px4_i2c_buses[I2C_BUS_MAX_BUS_ITEMS] = {
-	initI2CBusExternal(1),
-	initI2CBusExternal(2),
-	initI2CBusInternal(3),
 	initI2CBusExternal(4),
+	initI2CBusExternal(2),
+	initI2CBusExternal(1),
+	initI2CBusInternal(3),
 };