diff --git a/PROMS/DataLoader/frmLoader.cs b/PROMS/DataLoader/frmLoader.cs
index d3131669..55cb8bf4 100644
--- a/PROMS/DataLoader/frmLoader.cs
+++ b/PROMS/DataLoader/frmLoader.cs
@@ -586,7 +586,7 @@ namespace DataLoader
 		{
 			string pause = "pause";
 			string bckupFileName = tbxBackupFileName.Text;
-			if (!bckupFileName.EndsWith(".bck")) bckupFileName += ".bck";
+			if (!bckupFileName.EndsWith(".bak")) bckupFileName += ".bak";
 			string backupPath = _LogFilePath + @"\" + bckupFileName;
 			string bckupcmd = "sqlcmd -E -S.\\sqlexpress -Q \"backup database [VEPROMS] to disk = '" + backupPath + "'\"";
 			string rstorecmd = "sqlcmd -E -S.\\sqlexpress -Q \"restore database [VEPROMS] from disk = '" + backupPath + "'\"";