diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index 5850b27e..346b419c 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -120,7 +120,10 @@ verifyFreeDiskSpace() {
     # 25MB is the minimum space needed (20MB install + 5MB one day of logs.)
     requiredFreeBytes=25600
 
-    existingFreeBytes=`df -lk | awk '{print $4}' | head -2 | tail -1`
+    existingFreeBytes=`df -lk / 2>&1 | awk '{print $4}' | head -2 | tail -1`
+    if ! [[ "$existingFreeBytes" =~ ^[0-9]\+$ ]]; then
+        existingFreeBytes=`df -lk /dev 2>&1 | awk '{print $4}' | head -2 | tail -1`
+    fi
 
     if [[ $existingFreeBytes -lt $requiredFreeBytes ]]; then
         whiptail --msgbox --backtitle "Insufficient Disk Space" --title "Insufficient Disk Space" "\nYour system appears to be low on disk space. pi-hole recomends a minimum of $requiredFreeBytes Bytes.\nYou only have $existingFreeBytes Free.\n\nIf this is a new install you may need to expand your disk.\n\nTry running:\n    'sudo raspi-config'\nChoose the 'expand file system option'\n\nAfter rebooting, run this installation again.\n\ncurl -L install.pi-hole.net | bash\n" $r $c