diff --git audio/kmix/Makefile audio/kmix/Makefile
index eed155808da7..2985c73767cb 100644
--- audio/kmix/Makefile
+++ audio/kmix/Makefile
@@ -2,6 +2,7 @@
 
 PORTNAME=	kmix
 DISTVERSION=	${KDE_APPLICATIONS_VERSION}
+PORTREVISION=	1
 CATEGORIES=	audio kde kde-applications
 
 MAINTAINER=	kde@FreeBSD.org
diff --git audio/kmix/files/patch-backends_mixer__oss.cpp audio/kmix/files/patch-backends_mixer__oss.cpp
new file mode 100644
index 000000000000..592371ed574f
--- /dev/null
+++ audio/kmix/files/patch-backends_mixer__oss.cpp
@@ -0,0 +1,39 @@
+--- backends/mixer_oss.cpp.orig	2020-10-03 12:41:46 UTC
++++ backends/mixer_oss.cpp
+@@ -52,9 +52,9 @@
+    The #define below is only there for internal reasons.
+    In other words: Don't play around with this value
+  */
+-#define MAX_MIXDEVS 32
++#define MAX_MIXDEVS 25
+ 
+-const char* MixerDevNames[32]={
++const char* MixerDevNames[25]={
+     I18N_NOOP("Volume"),   I18N_NOOP("Bass"),       I18N_NOOP("Treble"),
+     I18N_NOOP("Synth"),    I18N_NOOP("Pcm"),        I18N_NOOP("Speaker"),
+     I18N_NOOP("Line"),     I18N_NOOP("Microphone"), I18N_NOOP("CD"),
+@@ -63,11 +63,9 @@ const char* MixerDevNames[32]={
+     I18N_NOOP("Line2"),    I18N_NOOP("Line3"),      I18N_NOOP("Digital1"),
+     I18N_NOOP("Digital2"), I18N_NOOP("Digital3"),   I18N_NOOP("PhoneIn"),
+     I18N_NOOP("PhoneOut"), I18N_NOOP("Video"),      I18N_NOOP("Radio"),
+-    I18N_NOOP("Monitor"),  I18N_NOOP("3D-depth"),   I18N_NOOP("3D-center"),
+-    I18N_NOOP("unknown"),  I18N_NOOP("unknown"),    I18N_NOOP("unknown"),
+-    I18N_NOOP("unknown") , I18N_NOOP("unused") };
++    I18N_NOOP("Monitor") };
+ 
+-const MixDevice::ChannelType MixerChannelTypes[32] = {
++const MixDevice::ChannelType MixerChannelTypes[25] = {
+     MixDevice::VOLUME,   MixDevice::BASS,       MixDevice::TREBLE,
+     MixDevice::MIDI,     MixDevice::AUDIO,      MixDevice::SPEAKER,
+     MixDevice::EXTERNAL, MixDevice::MICROPHONE, MixDevice::CD,
+@@ -76,9 +74,7 @@ const MixDevice::ChannelType MixerChannelTypes[32] = {
+     MixDevice::EXTERNAL, MixDevice::EXTERNAL,   MixDevice::DIGITAL,
+     MixDevice::DIGITAL,  MixDevice::DIGITAL,    MixDevice::EXTERNAL,
+     MixDevice::EXTERNAL, MixDevice::VIDEO,      MixDevice::EXTERNAL,
+-    MixDevice::EXTERNAL, MixDevice::VOLUME,     MixDevice::VOLUME,
+-    MixDevice::UNKNOWN,  MixDevice::UNKNOWN,    MixDevice::UNKNOWN,
+-    MixDevice::UNKNOWN,  MixDevice::UNKNOWN };
++    MixDevice::EXTERNAL };
+ 
+ Mixer_Backend* OSS_getMixer( Mixer* mixer, int device )
+ {