diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c
index b21d0dec9283..6a47682d8614 100644
--- a/drivers/video/intelfb/intelfbhw.c
+++ b/drivers/video/intelfb/intelfbhw.c
@@ -1352,7 +1352,7 @@ intelfbhw_program_mode(struct intelfb_info *dinfo,
 
 	/* turn off PLL */
 	tmp = INREG(dpll_reg);
-	dpll_reg &= ~DPLL_VCO_ENABLE;
+	tmp &= ~DPLL_VCO_ENABLE;
 	OUTREG(dpll_reg, tmp);
 
 	/* Set PLL parameters */