diff --git a/configure.in b/configure.in
index 495bf992c..2eb53b97e 100644
--- a/configure.in
+++ b/configure.in
@@ -807,6 +807,7 @@ if test "$enable_check-wx-opengl" = "yes"; then
 #include <wx/glcanvas.h>
 int main(void) {
   wxGLCanvas *canvas;
+  wxGLContext *context;
   return 0;
 } ])
 fi