diff --git a/images/linux/scripts/installers/validate-disk-space.sh b/images/linux/scripts/installers/validate-disk-space.sh
index 208a0e0f6..5201848d7 100644
--- a/images/linux/scripts/installers/validate-disk-space.sh
+++ b/images/linux/scripts/installers/validate-disk-space.sh
@@ -5,7 +5,7 @@
 ################################################################################
 
 availableSpaceMB=$(df / -hm | sed 1d | awk '{ print $4}')
-minimumFreeSpaceMB=$(( 18*1024 ))
+minimumFreeSpaceMB=18000
 
 echo "Available disk space: $availableSpaceMB MB"
 if [ $availableSpaceMB -le $minimumFreeSpaceMB ]; then