diff --git a/lib/libmixer/mixer.3 b/lib/libmixer/mixer.3
--- a/lib/libmixer/mixer.3
+++ b/lib/libmixer/mixer.3
@@ -23,7 +23,7 @@
 .\"
 
 .Dd September 22, 2021
-.Dt mixer 3
+.Dt MIXER 3
 .Os
 .Sh NAME
 .Nm mixer_open ,
diff --git a/usr.sbin/mixer/mixer.8 b/usr.sbin/mixer/mixer.8
--- a/usr.sbin/mixer/mixer.8
+++ b/usr.sbin/mixer/mixer.8
@@ -23,7 +23,7 @@
 .\"
 
 .Dd October 17, 2021
-.Dt mixer 8
+.Dt MIXER 8
 .Os
 .Sh NAME
 .Nm mixer