diff --git a/src/Conjure/Process/Enums.hs b/src/Conjure/Process/Enums.hs
index c46be5327..80a22b155 100644
--- a/src/Conjure/Process/Enums.hs
+++ b/src/Conjure/Process/Enums.hs
@@ -44,7 +44,12 @@ removeEnumsFromModel =
         preCheckForNameReuse model = do
             let enumNames = concat [ names | Declaration (LettingDomainDefnEnum _ names) <- mStatements model ]
             let redefinedTopLevel = [ name | Declaration (FindOrGiven _ name _) <- mStatements model, name `elem` enumNames ]
-            let redefinedQuantified = [ name | Generator gen <- universeBi (mStatements model), name@Name{} <- universeBi gen, name `elem` enumNames ]
+            let redefinedQuantified = [ name | Generator gen <- universeBi (mStatements model)
+                                             , name@Name{} <- case gen of
+                                                        GenDomainNoRepr defn _ -> universeBi defn
+                                                        GenDomainHasRepr defn _ -> universeBi defn
+                                                        GenInExpr defn _ -> universeBi defn
+                                             , name `elem` enumNames ]
             let redefined = redefinedTopLevel ++ redefinedQuantified
             let duplicates = [ name | (name, count) <- histogram enumNames, count > 1 ]
             unless (null duplicates) $ userErr1 $ "Enumerated value defined multiple times:" <+> prettyList id "," duplicates