diff --git a/mysqlbu-scripts.sh b/mysqlbu-scripts.sh
index d40f9a8..e01d400 100755
--- a/mysqlbu-scripts.sh
+++ b/mysqlbu-scripts.sh
@@ -51,11 +51,11 @@ DELETE_BACKUP() {
 		tba=`expr $tba + 1`
 	done
 	
-	if ! exists $1 in $tbus; then
+	[ ! ${tbus[$1]+abc} ] && {
 		echo "Incorrect entry, please select again...";
 		sleep 5
 		DELETE_MENU
-	fi
+	}
 	
 	sbu1=${tbus[$1]}
 	thr=`echo ${sbu1//_BASE/} | sed 's/.*\///'`