diff --git a/include/osgViewer/api/X11/GraphicsWindowX11 b/include/osgViewer/api/X11/GraphicsWindowX11
index 1efb990fe..fe40d7f8c 100644
--- a/include/osgViewer/api/X11/GraphicsWindowX11
+++ b/include/osgViewer/api/X11/GraphicsWindowX11
@@ -37,10 +37,11 @@ class OSGVIEWER_EXPORT GraphicsWindowX11 : public osgViewer::GraphicsWindow, pub
             _parent(0),
             _window(0),
             _visualInfo(0),
-            _fbConfig(0),
             #ifdef OSG_USE_EGL
             _eglDisplay(0),
             _eglSurface(0),
+            #else
+            _fbConfig(0),
             #endif
             _currentCursor(0),
             _initialized(false),
@@ -177,11 +178,12 @@ class OSGVIEWER_EXPORT GraphicsWindowX11 : public osgViewer::GraphicsWindow, pub
         Window          _parent;
         Window          _window;
         XVisualInfo*    _visualInfo;
-        GLXFBConfig     _fbConfig;
 
         #ifdef OSG_USE_EGL
         EGLDisplay      _eglDisplay;
         EGLSurface      _eglSurface;
+        #else
+        GLXFBConfig     _fbConfig;
         #endif
 
         Cursor          _currentCursor;