diff --git a/man7/unix.7 b/man7/unix.7
index 2a4311ab3..7627e9bd4 100644
--- a/man7/unix.7
+++ b/man7/unix.7
@@ -376,7 +376,8 @@ or
 .BR recvmsg (2).
 .TP
 .B EPROTONOSUPPORT
-Passed protocol is not AF_UNIX.
+Passed protocol is not
+.BR AF_UNIX .
 .TP
 .B EPROTOTYPE
 Remote socket does not match the local socket type