diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5d2904..7096040 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,17 @@
 ## Changelog
 
+## v1.2.1
+
+* Bug fixes
+  * Fix define structure via using
+
 ## v1.2.0
 
 * Enhancements
   * Add `struct` type
 
 ## v1.1.1
+
 * Enhancements
   * Definition in using macro
   * Add able to override fields
diff --git a/lib/construct.ex b/lib/construct.ex
index 18262bb..c7879f8 100644
--- a/lib/construct.ex
+++ b/lib/construct.ex
@@ -31,21 +31,21 @@ defmodule Construct do
 
   @doc false
   defmacro __using__(opts \\ []) do
-    definition = Keyword.get(opts, :do)
+    {definition, opts} = Keyword.pop(opts, :do)
 
-    structure =
+    pre_ast =
       if definition do
         defstructure(definition)
       else
-        []
+        quote do
+          import Construct, only: [structure: 1]
+        end
       end
 
     quote do
       @behaviour Construct
 
-      import Construct, only: [structure: 1]
-
-      unquote(structure)
+      unquote(pre_ast)
 
       @type t :: %__MODULE__{}
 
diff --git a/mix.exs b/mix.exs
index 191a35f..2fbef4b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -3,7 +3,7 @@ defmodule Construct.Mixfile do
 
   def project do
     [app: :construct,
-     version: "1.2.0",
+     version: "1.2.1",
      elixir: "~> 1.3",
      deps: deps(),
      test_coverage: [tool: ExCoveralls],