diff --git a/semantic-tags/src/AST/Element.hs b/semantic-tags/src/AST/Element.hs
index a71dc00c3..d480eef44 100644
--- a/semantic-tags/src/AST/Element.hs
+++ b/semantic-tags/src/AST/Element.hs
@@ -4,7 +4,7 @@ module AST.Element
 , pattern Prj
 ) where
 
-import GHC.Generics
+import GHC.Generics ((:+:)(..))
 import GHC.TypeLits (ErrorMessage(..), TypeError)
 
 -- | Projection of an element out of a tree of sums, particularly suitable for use with highly branching (e.g. balanced) trees.