diff --git a/scripts/firstrun b/scripts/firstrun
index 65cec2783d..6848793f2b 100644
--- a/scripts/firstrun
+++ b/scripts/firstrun
@@ -51,7 +51,7 @@ case "$1" in
                 sed -e 's/ether/ether '$NEWMAC'/g' -i /etc/network/interfaces.hostapd
 		# Cubietruck exception
 		# if HDMI is attached during boot, set default screen output to HDMI
-		if [ -n "$(dmesg | grep ParseEDID)" ] && [ -n "/boot/cubietruck.bin" ]; then
+		if [ -n "$(dmesg | grep ParseEDID)" ] && [ -f "/boot/cubietruck.bin" ]; then
 			bin2fex /boot/cubietruck.bin /tmp/tmp.fex
 			sed -e 's/screen0_output_type.*/screen0_output_type     = 3/g' -i /tmp/tmp.fex
 			fex2bin /tmp/tmp.fex /boot/cubietruck.bin