diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS
index 57e77cd269..80749fbe8c 100644
--- a/ROMFS/px4fmu_common/init.d/rcS
+++ b/ROMFS/px4fmu_common/init.d/rcS
@@ -479,6 +479,19 @@ else
 		pwm_out start
 	fi
 
+	#
+	# Optional UAVCAN/DroneCAN or Cyphal
+	#
+	if param greater -s UAVCAN_ENABLE 0
+	then
+		uavcan start
+	else
+		if param greater -s CYPHAL_ENABLE 0
+		then
+			cyphal start
+		fi
+	fi
+
 	#
 	# Configure vehicle type specific parameters.
 	# Note: rc.vehicle_setup is the entry point for all vehicle type specific setup.
@@ -507,6 +520,11 @@ else
 	#
 	. ${R}etc/init.d/rc.serial
 
+	if param greater -s ZENOH_ENABLE 0
+	then
+		zenoh start
+	fi
+
 	# Must be started after the serial config is read
 	rc_input start $RC_INPUT_ARGS
 
@@ -638,27 +656,6 @@ else
 	fi
 	unset BOARD_BOOTLOADER_UPGRADE
 
-	#
-	# Check if UAVCAN is enabled, default to it for ESCs.
-	#
-	if param greater -s UAVCAN_ENABLE 0
-	then
-		# Start core UAVCAN module.
-		if ! uavcan start
-		then
-			tune_control play error
-		fi
-	else
-		if param greater -s CYPHAL_ENABLE 0
-		then
-			cyphal start
-		fi
-	fi
-	if param greater -s ZENOH_ENABLE 0
-	then
-		zenoh start
-	fi
-
 #
 # End of autostart.
 #