diff --git a/src/aui/auibar.cpp b/src/aui/auibar.cpp
index 4170d8d960..68127865a7 100644
--- a/src/aui/auibar.cpp
+++ b/src/aui/auibar.cpp
@@ -774,7 +774,7 @@ int wxAuiDefaultToolBarArt::ShowDropDown(wxWindow* wnd,
 
 
 
-static wxOrientation GetOrientation(long& style)
+static wxOrientation GetOrientation(long style)
 {
     switch (style & wxAUI_ORIENTATION_MASK)
     {