diff --git a/src/Perspex.Controls/PlacementMode.cs b/src/Perspex.Controls/PlacementMode.cs
index a0ca30e9ad..321f8afa47 100644
--- a/src/Perspex.Controls/PlacementMode.cs
+++ b/src/Perspex.Controls/PlacementMode.cs
@@ -24,5 +24,10 @@ namespace Perspex.Controls
         /// The popup is placed at the top right of its target.
         /// </summary>
         Right,
+
+        /// <summary>
+        /// The popup is placed at the center of its target.
+        /// </summary>
+        Center
     }
 }