diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index ec011af..b4a3f3a 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -17,6 +17,7 @@
 
 - Non-namespaced flags
 - Various imgui-sys things that were deprecated in imgui/cimgui 1.51
+- `Window::bg_alpha`. Push a color change with `with_color_var` instead
 
 ## [0.0.16] - 2017-10-26
 
diff --git a/src/window.rs b/src/window.rs
index ec7cb7c..355939f 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -48,6 +48,8 @@ impl<'ui, 'p> Window<'ui, 'p> {
         self.opened = Some(opened);
         self
     }
+    #[deprecated(since = "0.0.17",
+                 note = "please use with_color_var and ImGuiCol::WindowBg instead")]
     #[inline]
     pub fn bg_alpha(mut self, bg_alpha: f32) -> Self {
         self.bg_alpha = bg_alpha;