diff --git a/sound/pci/hda/hda_auto_parser.c b/sound/pci/hda/hda_auto_parser.c
index 48a9d004d6d938ac5365b52a83c6b67b7b18dcaa..853c6a69e29e81c04c9fda91ce3500cf6a60fcbc 100644
--- a/sound/pci/hda/hda_auto_parser.c
+++ b/sound/pci/hda/hda_auto_parser.c
@@ -638,7 +638,7 @@ static int fill_audio_out_name(struct hda_codec *codec, hda_nid_t nid,
 			/* don't add channel suffix for Headphone controls */
 			int idx = get_hp_label_index(codec, nid, cfg->hp_pins,
 						     cfg->hp_outs);
-			if (idx >= 0)
+			if (idx >= 0 && indexp)
 				*indexp = idx;
 			sfx = "";
 		}