diff --git a/src/Lets/GetSetLens.hs b/src/Lets/GetSetLens.hs
index 8f0984d..dc77d70 100644
--- a/src/Lets/GetSetLens.hs
+++ b/src/Lets/GetSetLens.hs
@@ -51,6 +51,7 @@ import Prelude hiding (product)
 -- >>> import qualified Data.Map as Map(fromList)
 -- >>> import qualified Data.Set as Set(fromList)
 -- >>> import Data.Char(ord)
+-- >>> import Lets.Data
 
 data Lens a b =
   Lens
diff --git a/src/Lets/Lens.hs b/src/Lets/Lens.hs
index bf5c8d5..896f5b3 100644
--- a/src/Lets/Lens.hs
+++ b/src/Lets/Lens.hs
@@ -92,6 +92,7 @@ import Prelude hiding (product)
 -- >>> import qualified Data.Map as Map(fromList)
 -- >>> import qualified Data.Set as Set(fromList)
 -- >>> import Data.Char(ord)
+-- >>> import Lets.Data
 
 -- Let's remind ourselves of Traversable, noting Foldable and Functor.
 --
diff --git a/src/Lets/OpticPolyLens.hs b/src/Lets/OpticPolyLens.hs
index fb86853..15dea17 100644
--- a/src/Lets/OpticPolyLens.hs
+++ b/src/Lets/OpticPolyLens.hs
@@ -55,6 +55,7 @@ import Prelude hiding (product)
 -- >>> import qualified Data.Map as Map(fromList)
 -- >>> import qualified Data.Set as Set(fromList)
 -- >>> import Data.Char(ord)
+-- >>> import Lets.Data
 
 data Lens s t a b =
   Lens
diff --git a/src/Lets/StoreLens.hs b/src/Lets/StoreLens.hs
index 9579772..064cd43 100644
--- a/src/Lets/StoreLens.hs
+++ b/src/Lets/StoreLens.hs
@@ -59,6 +59,7 @@ import Prelude hiding (product)
 -- >>> import qualified Data.Map as Map(fromList)
 -- >>> import qualified Data.Set as Set(fromList)
 -- >>> import Data.Char(ord)
+-- >>> import Lets.Data
 
 setS ::
   Store s a