kc3-lang/kc3

diff --git a/libc3/window/sdl2/gl_object.h b/libc3/window/sdl2/gl_object.h
index b4bd54c..023406c 100644
--- a/libc3/window/sdl2/gl_object.h
+++ b/libc3/window/sdl2/gl_object.h
@@ -22,7 +22,7 @@ s_gl_object * gl_object_init (s_gl_object *object);
 
 /* Heap-allocation functions, call gl_object_delete after use. */
 void          gl_object_delete (s_gl_object *object);
-s_gl_object * gl_object_new ();
+s_gl_object * gl_object_new (void);
 
 /* Operators. */
 s_gl_object * gl_object_allocate (s_gl_object *object, uw vertex_count,