diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index c4a1b49..bc00a37 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6696,6 +6696,7 @@ static int patch_alc269(struct hda_codec *codec)
 	case 0x10ec0274:
 	case 0x10ec0294:
 		spec->codec_variant = ALC269_TYPE_ALC294;
+		spec->gen.mixer_nid = 0; /* ALC2x4 does not have any loopback mixer path */
 		alc_update_coef_idx(codec, 0x6b, 0x0018, (1<<4) | (1<<3)); /* UAJ MIC Vref control by verb */
 		break;
 	case 0x10ec0700: