diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index a9fd0572d5263e91a9d03234978f60ff061fcf89..b7339cb5c45bad3895971f35cb4a93bf6dc557a4 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -343,6 +343,7 @@ static void cxt_fixup_headphone_mic(struct hda_codec *codec,
 		snd_hdac_regmap_add_vendor_verb(&codec->core, 0x410);
 		break;
 	case HDA_FIXUP_ACT_PROBE:
+		WARN_ON(spec->gen.cap_sync_hook);
 		spec->gen.cap_sync_hook = cxt_update_headset_mode_hook;
 		spec->gen.automute_hook = cxt_update_headset_mode;
 		break;
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 32a7a72033ae3cffa94c6eaf6956f7f9f09704f4..d9461eebcfdfddf9d44c51ffa3a4ba9f70e4f057 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4828,6 +4828,7 @@ static void alc_probe_headset_mode(struct hda_codec *codec)
 			spec->headphone_mic_pin = cfg->inputs[i].pin;
 	}
 
+	WARN_ON(spec->gen.cap_sync_hook);
 	spec->gen.cap_sync_hook = alc_update_headset_mode_hook;
 	spec->gen.automute_hook = alc_update_headset_mode;
 	spec->gen.hp_automute_hook = alc_update_headset_jack_cb;