diff --git a/headers/private/graphics/intel_extreme/intel_extreme.h b/headers/private/graphics/intel_extreme/intel_extreme.h
index 89122ae575..964695e8e9 100644
--- a/headers/private/graphics/intel_extreme/intel_extreme.h
+++ b/headers/private/graphics/intel_extreme/intel_extreme.h
@@ -223,6 +223,7 @@ struct intel_free_graphics_memory {
 #define DISPLAY_PLL_MODE_ANALOG			(1UL << 26)
 #define DISPLAY_PLL_DIVIDE_HIGH			(1UL << 24)
 #define DISPLAY_PLL_DIVIDE_4X			(1UL << 23)
+#define DISPLAY_PLL_POST1_DIVIDE_2		(1UL << 21)
 #define DISPLAY_PLL_POST1_DIVISOR_MASK	0x001f0000
 #define DISPLAY_PLL_9xx_POST1_DIVISOR_MASK	0x00ff0000
 #define DISPLAY_PLL_POST1_DIVISOR_SHIFT	16