diff --git a/src/i830_bios.c b/src/i830_bios.c
index 007530d..dba66ae 100644
--- a/src/i830_bios.c
+++ b/src/i830_bios.c
@@ -131,6 +131,7 @@ parse_panel_data(I830Ptr pI830, struct bdb_header *bdb)
 	_V_BLANK(timing_ptr);
     fixed_mode->Clock      = _PIXEL_CLOCK(timing_ptr) / 1000;
     fixed_mode->type       = M_T_PREFERRED;
+    fixed_mode->Flags	   = V_PHSYNC | V_PVSYNC;
 
     xf86SetModeDefaultName(fixed_mode);