diff --git a/VECTO/GUI/MainForm.vb b/VECTO/GUI/MainForm.vb
index de16c7ced350084401c41cd30ad8a984714036f8..164e7ff11544f541dbb71cfb7d462c42f357a1e2 100644
--- a/VECTO/GUI/MainForm.vb
+++ b/VECTO/GUI/MainForm.vb
@@ -182,7 +182,7 @@ Public Class MainForm
         TorqueConverterShiftPolygonFileBrowser.Extensions = New String() {"vgbs"}
         CrossWindCorrectionFileBrowser.Extensions = New String() {"vcdv", "vcdb"}
         ElectricMotorFileBrowser.Extensions = New String() {"vem"}
-        REESSFileBrowser.Extensions = New String() {"vreess"}
+        REESSFileBrowser.Extensions = New String() {"vreess", "vbat"}
         EmADCLossMapFileBrowser.Extensions = New String() {"vtlm"}
 
         ElectricMachineDragTorqueFileBrowser.Extensions = New String() {"vemd"}