diff --git a/PROMS/Volian.Controls.Library/DisplayApplicability.cs b/PROMS/Volian.Controls.Library/DisplayApplicability.cs
index 03cbc255..5d5e999d 100644
--- a/PROMS/Volian.Controls.Library/DisplayApplicability.cs
+++ b/PROMS/Volian.Controls.Library/DisplayApplicability.cs
@@ -37,6 +37,7 @@ namespace Volian.Controls.Library
 						dcfg.SelectedSlave = n;
 						names.Add(dcfg.Unit_Name);
 					}
+					dcfg.SelectedSlave = 0;
 //					string[] names = dcfg.Unit_Name.Split(',');
 					int apple = -1;
 					if(_MyDisplayTabItem.MyStepTabPanel != null)