diff --git a/src/osx/cocoa/dataview.mm b/src/osx/cocoa/dataview.mm
index 5eb81a5284..170353197a 100644
--- a/src/osx/cocoa/dataview.mm
+++ b/src/osx/cocoa/dataview.mm
@@ -2456,6 +2456,7 @@ void wxCocoaDataViewControl::Unselect(const wxDataViewItem& item)
 void wxCocoaDataViewControl::UnselectAll()
 {
     [m_OutlineView deselectAll:m_OutlineView];
+    [m_OutlineView setNeedsDisplay:YES];
 }
 
 //