diff --git a/gui/builtinViews/fittingView.py b/gui/builtinViews/fittingView.py
index 3884eda6e..b1d4d074c 100644
--- a/gui/builtinViews/fittingView.py
+++ b/gui/builtinViews/fittingView.py
@@ -562,7 +562,10 @@ class FittingView(d.Display):
 
             if sFit.serviceFittingOptions["rackSlots"]:
                 # flag to know when to add blanks, based on previous slot
-                slotDivider = None if sFit.serviceFittingOptions["rackLabels"] else self.mods[0].slot
+                if sFit.serviceFittingOptions["rackLabels"] or len(self.mods) == 0:
+                    slotDivider = None
+                else:
+                    slotDivider = self.mods[0].slot
 
                 # first loop finds where slot dividers must go before modifying self.mods
                 for i, mod in enumerate(self.mods):