diff --git a/datafusion/src/logical_plan/builder.rs b/datafusion/src/logical_plan/builder.rs
index 87716aff276c..af0d29ba5e56 100644
--- a/datafusion/src/logical_plan/builder.rs
+++ b/datafusion/src/logical_plan/builder.rs
@@ -289,6 +289,8 @@ impl LogicalPlanBuilder {
     }
 
     /// Apply a window
+    /// 
+    /// NOTE: this feature is under development and this API will be changing 
     pub fn window(
         &self,
         window_expr: impl IntoIterator<Item = Expr>,