diff --git a/app/imports/api/creature/creatureProperties/methods/getSlotFillFilter.js b/app/imports/api/creature/creatureProperties/methods/getSlotFillFilter.js
index c80f7fa3..d4670c95 100644
--- a/app/imports/api/creature/creatureProperties/methods/getSlotFillFilter.js
+++ b/app/imports/api/creature/creatureProperties/methods/getSlotFillFilter.js
@@ -24,7 +24,9 @@ export default function getSlotFillFilter({slot, libraryIds}){
         slotFillerType: 'classLevel',
       }]
     });
-    filter.variableName = slot.variableName;
+    if (slot.variableName) { 
+      filter.variableName = slot.variableName;
+    }
 
     // Only search for levels the class needs
     if (slot.missingLevels && slot.missingLevels.length) {