diff --git a/share/man/man4/udbp.4 b/share/man/man4/udbp.4
index d8f0bd820bb3..0b53d3a4074a 100644
--- a/share/man/man4/udbp.4
+++ b/share/man/man4/udbp.4
@@ -32,7 +32,7 @@
 .\"
 .Dd April 30, 2000
 .Dt UDBP 4
-.Os FreeBSD
+.Os
 .Sh NAME
 .Nm udbp
 .Nd USB Double Bulk Pipe driver