diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS
index b21ca9ec88..1027d90eac 100644
--- a/ROMFS/px4fmu_common/init.d/rcS
+++ b/ROMFS/px4fmu_common/init.d/rcS
@@ -289,6 +289,7 @@ then
 		if ver hwcmp PX4FMU_V1
 		then
 			set FMU_MODE serial
+			set GPS no
 		fi
 	fi
 	unset HIL
@@ -319,6 +320,7 @@ then
 			gps start
 		fi
 	fi
+	unset GPS
 	unset GPS_FAKE
 
 	# Needs to be this early for in-air-restarts