diff --git a/setup-teslausb b/setup-teslausb
index 39b3bf5..a48ada8 100644
--- a/setup-teslausb
+++ b/setup-teslausb
@@ -102,7 +102,7 @@ function create_usb_drive_backing_files () {
     echo "Mounted the partition for the backing files."
   fi
 
-  if [! -e /backingfiles/* ]
+  if [! -e /backingfiles/*.bin ]
   then
     /tmp/create-backingfiles.sh "$campercent" "$BACKINGFILES_MOUNTPOINT"
   fi