diff --git a/gentoo-gnome.sh b/gentoo-gnome.sh
index 30c66a6..2af9fc6 100644
--- a/gentoo-gnome.sh
+++ b/gentoo-gnome.sh
@@ -464,7 +464,7 @@ btrfs-tweaks() {
 
 initialize-disk() {
 	SWAP_SIZE=$(expr $(cat /proc/meminfo | head -1 | cut -d ':' -f2 | sed 's/ //g' | sed 's/kB//') / 1024)
-	SWAP_SIZE_END="$(expr $SWAP_SIZE + $ROOT_PARTITION_SIZE / 1000 / 1000 / 1000)"
+	SWAP_SIZE_END="$(expr $(expr $SWAP_SIZE + $ROOT_PARTITION_SIZE) / 1000)"
 	echo "Start: $SWAP_SIZE  END: $SWAP_SIZE_END"
 	parted /dev/$HARD_DISK mklabel gpt
 	parted -a optimal /dev/$HARD_DISK mkpart primary fat32 1MiB 200MiB