diff --git a/general/overlay/usr/sbin/sysupgrade b/general/overlay/usr/sbin/sysupgrade
index 4cf88ef7..64d00cfc 100755
--- a/general/overlay/usr/sbin/sysupgrade
+++ b/general/overlay/usr/sbin/sysupgrade
@@ -117,7 +117,7 @@ self_update() {
 		echo -e "\nOnline upgrade, checking sysupgrade version..."
 		curl -s -k -L -o /tmp/sysupgrade "https://raw.githubusercontent.com/OpenIPC/firmware/master/general/overlay/usr/sbin/sysupgrade"
 		if [ -f /tmp/sysupgrade ] && grep -q "#!/bin/sh" /tmp/sysupgrade; then
-			dstv=`grep scr_version /tmp/sysupgrade | head -1 | cut -f 2 -d '='`
+			dstv=$(grep scr_version /tmp/sysupgrade | head -1 | cut -f 2 -d '=')
 			if ! [ "${scr_version}" = "${dstv}" ]; then
 				echo "A new version is available, trying to activate updated script..."
 				chmod +x /tmp/sysupgrade