diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index b0ab185..6155850 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -524,7 +524,7 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
                if ((rdev->family == CHIP_RS600) ||
                    (rdev->family == CHIP_RS690) ||
                    (rdev->family == CHIP_RS740))
-                       pll->flags |= (/*RADEON_PLL_USE_FRAC_FB_DIV |*/
+                       pll->flags |= (RADEON_PLL_USE_FRAC_FB_DIV |
                                       RADEON_PLL_PREFER_CLOSEST_LOWER);
 
                if (ASIC_IS_DCE32(rdev) && mode->clock > 200000)        /* range limits??? */