diff --git a/src/x11/window.cpp b/src/x11/window.cpp
index 836d5c2202..ba61bd3939 100644
--- a/src/x11/window.cpp
+++ b/src/x11/window.cpp
@@ -794,17 +794,6 @@ wxPoint wxWindowX11::GetClientAreaOrigin() const
     return wxPoint(0, 0);
 }
 
-// Makes an adjustment to the window position (for example, a frame that has
-// a toolbar that it manages itself).
-void wxWindowX11::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags)
-{
-    if (((sizeFlags & wxSIZE_NO_ADJUSTMENTS) == 0) && GetParent())
-    {
-        wxPoint pt(GetParent()->GetClientAreaOrigin());
-        x += pt.x; y += pt.y;
-    }
-}
-
 void wxWindowX11::SetSizeHints(int minW, int minH, int maxW, int maxH, int incW, int incH)
 {
     m_minWidth = minW;