diff --git a/include/wx/x11/privx.h b/include/wx/x11/privx.h
index ef445f3ba3..412e64e26c 100644
--- a/include/wx/x11/privx.h
+++ b/include/wx/x11/privx.h
@@ -66,9 +66,6 @@ void wxAllocColor(Display *display,Colormap colormap,XColor *xcolor);
 // For debugging
 wxString wxGetXEventName(XEvent& event);
 
-// Is the window visible?
-bool wxWindowIsVisible(Window win);
-
 #if wxUSE_NANOX
 #define XEventGetWindow(event) event->general.wid
 #define XEventGetType(event) event->general.type
diff --git a/src/x11/utils.cpp b/src/x11/utils.cpp
index ffc6805717..fa01d86848 100644
--- a/src/x11/utils.cpp
+++ b/src/x11/utils.cpp
@@ -395,10 +395,3 @@ wxString wxGetXEventName(XEvent& event)
 #endif
 }
 
-bool wxWindowIsVisible(Window win)
-{
-    XWindowAttributes wa;
-    XGetWindowAttributes(wxGlobalDisplay(), win, &wa);
-
-    return (wa.map_state == IsViewable);
-}
diff --git a/src/x11/window.cpp b/src/x11/window.cpp
index e9692b8600..3b569bf98f 100644
--- a/src/x11/window.cpp
+++ b/src/x11/window.cpp
@@ -397,7 +397,10 @@ void wxWindowX11::SetFocus()
     }
 #endif
 
-    if (wxWindowIsVisible(xwindow))
+    XWindowAttributes wa;
+    XGetWindowAttributes(wxGlobalDisplay(), xwindow, &wa);
+
+    if (wa.map_state == IsViewable)
     {
         wxLogTrace( wxT("focus"), wxT("wxWindowX11::SetFocus: %s"), GetClassInfo()->GetClassName());
         //        XSetInputFocus( wxGlobalDisplay(), xwindow, RevertToParent, CurrentTime );