diff --git a/boards/px4/fmu-v4/init/rc.board_extras b/boards/px4/fmu-v4/init/rc.board_extras
index d926dfd79d..6ba582d035 100644
--- a/boards/px4/fmu-v4/init/rc.board_extras
+++ b/boards/px4/fmu-v4/init/rc.board_extras
@@ -5,9 +5,8 @@
 
 
 # Pixracer: start MAVLink on Wifi (ESP8266 port). Except for the TealOne airframe.
-if param compare SYS_AUTOSTART 4250
+if ! param compare SYS_AUTOSTART 4250
 then
-else
 	mavlink start -r 20000 -b 921600 -d /dev/ttyS0
 fi