diff --git a/src/backend/gl/glx.c b/src/backend/gl/glx.c
index c24ca19..76f6b34 100644
--- a/src/backend/gl/glx.c
+++ b/src/backend/gl/glx.c
@@ -9,7 +9,7 @@
  *
  */
 
-#include "backend/gl/glx.h"
+#include <locale.h>
 #include <GL/glx.h>
 #include "backend/backend.h"
 #include "backend/gl/gl_common.h"
diff --git a/src/backend/gl/glx.h b/src/backend/gl/glx.h
deleted file mode 100644
index 1dfeea1..0000000
--- a/src/backend/gl/glx.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// SPDX-License-Identifier: MIT
-/*
- * Compton - a compositor for X11
- *
- * Based on `xcompmgr` - Copyright (c) 2003, Keith Packard
- *
- * Copyright (c) 2011-2013, Christopher Jeffrey
- * See LICENSE-mit for more information.
- *
- */
-
-#pragma once
-
-#include <ctype.h>
-#include <locale.h>
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <assert.h>
-#include <stddef.h>
-
-#include "common.h"
-
-#if 0
-struct _glx_data;
-struct _glx_win_data;
-
-void
-glx_destroy(session_t *ps);
-
-bool
-glx_reinit(session_t *ps, bool need_render);
-
-void
-glx_on_root_change(session_t *ps);
-
-bool
-glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
-    unsigned width, unsigned height, unsigned depth);
-
-void
-glx_release_pixmap(struct _glx_data *, Display *, struct _glx_win_data *);
-
-void glx_paint_pre(session_t *ps, region_t *preg)
-__attribute__((nonnull(1, 2)));
-
-/**
- * Check if a texture is binded, or is binded to the given pixmap.
- */
-static inline bool
-glx_tex_binded(const glx_texture_t *ptex, xcb_pixmap_t pixmap) {
-  return ptex && ptex->glpixmap && ptex->texture
-    && (!pixmap || pixmap == ptex->pixmap);
-}
-#endif