diff --git a/src/ribbon/panel.cpp b/src/ribbon/panel.cpp
index 05621a9a05..06ad53dd89 100644
--- a/src/ribbon/panel.cpp
+++ b/src/ribbon/panel.cpp
@@ -775,6 +775,7 @@ bool wxRibbonPanel::ShowExpanded()
 
     m_expanded_panel->Realize();
     Refresh();
+    container->SetMinClientSize(size);
     container->Show();
     m_expanded_panel->SetFocus();