diff --git a/MVMCoreUI/OtherHandlers/MoleculeMappingObject+Extension.swift b/MVMCoreUI/OtherHandlers/MoleculeMappingObject+Extension.swift
index a5dd2cbe..3c88a743 100644
--- a/MVMCoreUI/OtherHandlers/MoleculeMappingObject+Extension.swift
+++ b/MVMCoreUI/OtherHandlers/MoleculeMappingObject+Extension.swift
@@ -17,7 +17,7 @@ public extension MVMCoreUIMoleculeMappingObject {
         }
         guard moleculeName == "moduleMolecule" else {
             // Not a module molecule.
-            return (map, moleculeName, nil)
+            return (map, nil, nil)
         }
         
         guard let moduleName = map.optionalStringForKey("moduleName"),