diff --git a/src/aui/framemanager.cpp b/src/aui/framemanager.cpp
index 72799379ec..129c68bf37 100644
--- a/src/aui/framemanager.cpp
+++ b/src/aui/framemanager.cpp
@@ -1170,7 +1170,9 @@ void wxFrameManager::LayoutAddPane(wxSizer* cont,
     {
         sizer_item = vert_pane_sizer->Add(pane.window, 1, wxEXPAND);
         // Don't do this because it breaks the pane size in floating windows
-        // vert_pane_sizer->SetItemMinSize(pane.window, 1, 1);
+        // BIW: Right now commenting this out is causing problems with
+        // an mdi client window as the center pane.
+        vert_pane_sizer->SetItemMinSize(pane.window, 1, 1);
     }
 
     part.type = wxDockUIPart::typePane;