diff --git a/roles/shell/files/usr/local/bin/backup b/roles/shell/files/usr/local/bin/backup
index fe7819d..3ce1e91 100644
--- a/roles/shell/files/usr/local/bin/backup
+++ b/roles/shell/files/usr/local/bin/backup
@@ -6,19 +6,19 @@ BACKUPS=/var/backups
 DUMPS=7
 
 # Search for the last full backup.
-LEVEL0=$(find $BACKUPS -name "*full.tgz" | sort | tail -n1)
+LASTF=$(find $BACKUPS -name "*full.tgz" | sort | tail -n1)
 # Search and count incremental dumps newer than the last full backup.
-INCR=$(find $BACKUPS -name "*incremental.tgz" -newer $LEVEL0 | wc -l)
+INCR=$(find $BACKUPS -name "*incremental.tgz" -newer $LASTF | wc -l)
 
 # If there is at least one full backup and less than specified incremental dumps
-if [ ! -z $LEVEL0 ] && [ $INCR -le $DUMPS ]
+if [ ! -z $LASTF ] && [ $INCR -le $DUMPS ]
 then
   TYPE=incremental
 else
   TYPE=full
   rm -f $BACKUPS/*.snapshot
   # Remove the first backup set (full and incremental dumps) if there is a second one.
-  find $BACKUPS -name "*.tgz" ! -newer $LEVEL0 ! -wholename $LEVEL0 -exec rm {} \;
+  find $BACKUPS -name "*.tgz" ! -newer $LASTF ! -wholename $LASTF -exec rm {} \;
 fi
 
 nice tar -cz \