diff --git a/gentoo-gnome.sh b/gentoo-gnome.sh
index 5bd258f..123bf09 100644
--- a/gentoo-gnome.sh
+++ b/gentoo-gnome.sh
@@ -463,7 +463,7 @@ btrfs-tweaks() {
 }
 
 initialize-disk() {
-	SWAP_SIZE=expr $(cat /proc/meminfo | head -1 | cut -d ':' -f2 | sed 's/ //g' | sed 's/kB//') / 1024
+	SWAP_SIZE=$(expr $(cat /proc/meminfo | head -1 | cut -d ':' -f2 | sed 's/ //g' | sed 's/kB//') / 1024)
 	echo "Test: $SWAP_SIZE"
 	parted /dev/$HARD_DISK mklabel gpt
 	parted -a optimal /dev/$HARD_DISK mkpart primary fat32 1MiB 200MiB