diff --git a/docs/setup.sh b/docs/setup.sh
index 6867227d..2820a5c4 100755
--- a/docs/setup.sh
+++ b/docs/setup.sh
@@ -9,7 +9,7 @@ sleep 10
 
 # Import and trust the GPG key
 echo "Setting up user GPG key..... "
-drive=(lsblk -o serial,name | grep -A 012345679518 | awk {'print $2'})
+drive=$(lsblk -o serial,name | grep -A 012345679518 | awk {'print $2'})
 sudo mkdir /tmp/drive
 sudo cryptsetup luksOpen /dev/${drive}3 usb-luks
 sudo mount /dev/mapper/usb-luks /tmp/drive