diff --git a/drivers/video/fbdev/gxt4500.c b/drivers/video/fbdev/gxt4500.c
index 3ceddb8..31de650 100644
--- a/drivers/video/fbdev/gxt4500.c
+++ b/drivers/video/fbdev/gxt4500.c
@@ -142,7 +142,7 @@
 
 struct gxt4500_par {
 	void __iomem *regs;
-
+	int wc_cookie;
 	int pixfmt;		/* pixel format, see DFA_PIX_* values */
 
 	/* PLL parameters */
@@ -671,6 +671,9 @@
 
 	pci_set_drvdata(pdev, info);
 
+	par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
+					  info->fix.smem_len);
+
 #ifdef __BIG_ENDIAN
 	/* Set byte-swapping for DFA aperture for all pixel sizes */
 	pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);
@@ -735,6 +738,7 @@
 		return;
 	par = info->par;
 	unregister_framebuffer(info);
+	arch_phys_wc_del(par->wc_cookie);
 	fb_dealloc_cmap(&info->cmap);
 	iounmap(par->regs);
 	iounmap(info->screen_base);