diff --git a/boards/px4/fmu-v6c/src/i2c.cpp b/boards/px4/fmu-v6c/src/i2c.cpp
index c774c0f4049..61785c89bc1 100644
--- a/boards/px4/fmu-v6c/src/i2c.cpp
+++ b/boards/px4/fmu-v6c/src/i2c.cpp
@@ -36,5 +36,5 @@
 constexpr px4_i2c_bus_t px4_i2c_buses[I2C_BUS_MAX_BUS_ITEMS] = {
 	initI2CBusExternal(1),
 	initI2CBusExternal(2),
-	initI2CBusExternal(4),
+	initI2CBusInternal(4),
 };