diff --git a/colonnade/src/Colonnade/Encoding.hs b/colonnade/src/Colonnade/Encoding.hs
index b764df2..0d3bb27 100644
--- a/colonnade/src/Colonnade/Encoding.hs
+++ b/colonnade/src/Colonnade/Encoding.hs
@@ -6,6 +6,7 @@ module Colonnade.Encoding
     -- * Create
     headed
   , headless
+  , singleton
     -- * Transform
   , fromMaybe
   , columns