Fix Issue #54
Fix Issue #54

ffjiao/mapdb,morfeo8marc/mapdb,codeaudit/mapdb,jankotek/MapDB,olupas/MapDB,lamfire/mapdb,sumit784/mapdb,ringoluo/mapdb,olupas/MapDB,pettermahlen/mapdb,SleimanJneidi/mapdb,jankotek/mapdb,jankotek/MapDB,hangum/mapdb,mebigfatguy/mapdb,binarytemple/mapdb,jankotek/mapdb,cocosli/mapdb,mebigfatguy/mapdb