diff --git a/audio/xfce4-mixer/files/patch-libxfce4mixer_oss_oss-mixer.c b/audio/xfce4-mixer/files/patch-libxfce4mixer_oss_oss-mixer.c
new file mode 100644
index 000000000000..9ee7e88edf01
--- /dev/null
+++ b/audio/xfce4-mixer/files/patch-libxfce4mixer_oss_oss-mixer.c
@@ -0,0 +1,12 @@
+--- libxfce4mixer/oss/oss-mixer.c.orig	2022-11-29 19:59:39 UTC
++++ libxfce4mixer/oss/oss-mixer.c
+@@ -80,7 +80,8 @@ gst_mixer_oss_get_mixer_flags (GstMixer *mixer)
+ }
+ 
+ 
+-static void gst_mixer_oss_set_volume (GstMixer *mixer, GstMixerTrack *track, gint *volumes)
++static void
++gst_mixer_oss_set_volume (GstMixer *mixer, GstMixerTrack *track, gint num_channels, gint *volumes)
+ {
+   int vol;
+   int l = volumes[0], r = volumes[1];