diff --git a/protolude.cabal b/protolude.cabal
index 18d006df8..f91c94ea9 100644
--- a/protolude.cabal
+++ b/protolude.cabal
@@ -42,6 +42,7 @@ library
     Monad
     Show
     Unsafe
+    Either
     Functor
     Bifunctor