diff --git a/lub.cabal b/lub.cabal
--- a/lub.cabal
+++ b/lub.cabal
@@ -1,5 +1,5 @@
 Name:                lub
-Version:             0.1.5
+Version:             0.1.6
 Cabal-Version:       >= 1.2
 Synopsis:            information operators: least upper bound (lub) and greatest lower bound (glb)
 Category:            Concurrency, Data, Other
diff --git a/src/Data/Glb.hs b/src/Data/Glb.hs
--- a/src/Data/Glb.hs
+++ b/src/Data/Glb.hs
@@ -58,7 +58,7 @@
 instance (HasGlb a, HasGlb b) => HasGlb (Either a b) where
   Left  a `glb` Left  a' = Left  (a `glb` a')
   Right b `glb` Right b' = Right (b `glb` b')
-  _ `glb` _ = glbBottom "bottom (Left/Right mismatch)"
+  _ `glb` _ = glbBottom "Left/Right mismatch"
 
 
 -- 'glb' on representations