diff --git a/src/msw/headerctrl.cpp b/src/msw/headerctrl.cpp
index 68ee831c55..822b986c65 100644
--- a/src/msw/headerctrl.cpp
+++ b/src/msw/headerctrl.cpp
@@ -480,7 +480,7 @@ void wxMSWHeaderCtrl::DoInsertItem(const wxHeaderColumn& col, unsigned int idx)
 
     if ( col.GetAlignment() != wxALIGN_NOT )
     {
-        hdi.mask |= HDI_FORMAT | HDF_LEFT;
+        hdi.mask |= HDI_FORMAT;
         switch ( col.GetAlignment() )
         {
             case wxALIGN_LEFT: