diff --git a/build/build-stormux.sh b/build/build-stormux.sh
index 5792e3f..5bbb6d3 100755
--- a/build/build-stormux.sh
+++ b/build/build-stormux.sh
@@ -125,7 +125,7 @@ url[3]="http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-2-latest.tar.gz"
 #url[4]="http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-aarch64-latest.tar.gz"
 url[4]="http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-4-latest.tar.gz"
 
-fallocate -l $imageSize "$imageName"
+fallocate -l "$imageSize" "$imageName"
 loopdev="$(losetup --find --show "${imageName}")"
 parted --script "${loopdev}" mklabel msdos mkpart primary fat32 0% 100M mkpart primary ext4 100M 100%
 mkfs.vfat -F32 "${loopdev}p1"