diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS
index ed19f648a8..8e03c477e1 100644
--- a/ROMFS/px4fmu_common/init.d/rcS
+++ b/ROMFS/px4fmu_common/init.d/rcS
@@ -647,6 +647,12 @@ then
 		px4flow start &
 	fi
 
+	if ver hwcmp PX4FMU_V4
+	then
+		# Check for flow sensor - as it is a background task, launch it last
+		px4flow start &
+	fi
+
 	if ver hwcmp MINDPX_V2
 	then
 		#mindxp also need flow