diff --git a/src/legacy_crtc.c b/src/legacy_crtc.c
index 06ad60c..32c29d0 100644
--- a/src/legacy_crtc.c
+++ b/src/legacy_crtc.c
@@ -1661,7 +1661,7 @@ legacy_crtc_mode_set(xf86CrtcPtr crtc, DisplayModePtr mode,
     Bool           tilingOld   = info->tilingEnabled;
     int i = 0;
     double dot_clock = 0;
-    int pll_flags = RADEON_PLL_LEGACY;
+    int pll_flags = RADEON_PLL_LEGACY | RADEON_PLL_USE_BIOS_DIVS;
     Bool update_tv_routing = FALSE;