diff --git a/src/PostgREST/DbRequestBuilder.hs b/src/PostgREST/DbRequestBuilder.hs
index 8770d8b0a..b9cd3b804 100644
--- a/src/PostgREST/DbRequestBuilder.hs
+++ b/src/PostgREST/DbRequestBuilder.hs
@@ -303,7 +303,7 @@ mutateRequest schema tName apiRequest pkCols readReq = mapLeft errorResponseFor
            not (null (S.fromList pkCols)) &&
            all (\case
               Filter _ (OpExpr False (Op "eq" _)) -> True
-              _ -> False) flts
+              _                                   -> False) flts
           then Insert qi (iColumns apiRequest) (Just (MergeDuplicates, pkCols)) <$> combinedLogic <*> pure returnings
         else
           Left InvalidFilters) =<< filters