diff --git a/share/man/man9/mbuf.9 b/share/man/man9/mbuf.9
index 5f2947af5a0..7c0eec82676 100644
--- a/share/man/man9/mbuf.9
+++ b/share/man/man9/mbuf.9
@@ -534,6 +534,9 @@ for non-critical paths.
 Allocate an
 .Vt mbuf
 and zero out the data region.
+.It Fn m_free mbuf
+Frees
+.Vt mbuf .
 .El
 .Pp
 The functions below operate on