diff --git a/PROMS/Volian.Controls.Library/StepTabRibbon.cs b/PROMS/Volian.Controls.Library/StepTabRibbon.cs
index 30ac589d..0a7f711a 100644
--- a/PROMS/Volian.Controls.Library/StepTabRibbon.cs
+++ b/PROMS/Volian.Controls.Library/StepTabRibbon.cs
@@ -376,7 +376,15 @@ namespace Volian.Controls.Library
 			if (MyEditItem is GridItem && (MyEditItem as GridItem).MyFlexGrid.IsRoTable)
 				btnCMGoTo.Enabled = btnGoTo.Enabled = true;
 			else
-				btnCMGoTo.Enabled = btnGoTo.Enabled = _MyStepRTB.IsSelectionLinked(_MyStepRTB.SelectionStart, _MyStepRTB.SelectionLength);
+			{
+				if (_MyStepRTB.IsSelectionLinked(_MyStepRTB.SelectionStart, _MyStepRTB.SelectionLength))
+				{
+					// if selected text = ?, i.e. a missing/undefined destination, don't allow go to
+					btnCMGoTo.Enabled = btnGoTo.Enabled = !_MyStepRTB.SelectedText.StartsWith("?");
+				}
+				else
+					btnCMGoTo.Enabled = btnGoTo.Enabled = false;
+			}
 		}
 		void _MyStepRTB_Leave(object sender, EventArgs e)
 		{