diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 6c209cd26c0ca..2191d445d74e3 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -229,7 +229,7 @@ struct dp_audio_infoframe {
 union audio_infoframe {
 	struct hdmi_audio_infoframe hdmi;
 	struct dp_audio_infoframe dp;
-	u8 bytes[0];
+	DECLARE_FLEX_ARRAY(u8, bytes);
 };
 
 /*