diff --git a/configure.in b/configure.in
index 46ac94916..ecfb056ce 100644
--- a/configure.in
+++ b/configure.in
@@ -1374,6 +1374,7 @@ CheckOpenGLX11()
         AC_TRY_COMPILE([
          #include <GL/gl.h>
          #include <GL/glx.h>
+         #include <GL/glu.h>
         ],[
         ],[
         video_opengl=yes