diff --git a/boards/px4/fmu-v3/init/rc.board_sensors b/boards/px4/fmu-v3/init/rc.board_sensors
index e6ce8ed0e8..b75f8bc9da 100644
--- a/boards/px4/fmu-v3/init/rc.board_sensors
+++ b/boards/px4/fmu-v3/init/rc.board_sensors
@@ -115,4 +115,7 @@ else
 	lsm303d start
 fi
 
+# External RM3100 (I2C or SPI)
+rm3100 start
+
 unset BOARD_FMUV3