diff --git a/drivers/video/aty/mach64_ct.c b/drivers/video/aty/mach64_ct.c
index f3b487b..96e91ee 100644
--- a/drivers/video/aty/mach64_ct.c
+++ b/drivers/video/aty/mach64_ct.c
@@ -614,7 +614,8 @@ static void aty_resume_pll_ct(const struct fb_info *info,
 		 * helps for Rage Mobilities that sometimes crash when
 		 * we switch to sclk. (Daniel Mantione, 13-05-2003)
 		 */
-		for (i=0;i<=0x1ffff;i++);
+		for (i=0;i<=0x1ffff;i++)
+			barrier();
 	}
 
 	aty_st_pll_ct(PLL_REF_DIV, pll->ct.pll_ref_div, par);