diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 816d81071437..a49d84401df1 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -571,6 +571,15 @@ struct bdb_display_toggle {
 	u16 list[];						/* ALM only */
 } __packed;
 
+/*
+ * Block 4 - Mode Support List
+ */
+
+struct bdb_mode_support_list {
+	u8 intel_mode_number[0];
+	u16 mode_list_length;
+} __packed;
+
 /*
  * Block 9 - SRD Feature Block
  */