1 files changed, 9 insertions, 9 deletions
diff --git a/man/man4/plumber.4 b/man/man4/plumber.4
index a86f032a..c309a39c 100644
--- a/man/man4/plumber.4
+++ b/man/man4/plumber.4
@@ -14,17 +14,17 @@ plumber \- file system for interprocess messaging
 The
 .I plumber
 is a user-level file server that receives, examines, rewrites, and dispatches
-.IM plumb (7)
+.MR plumb (7)
 messages between programs.
 Its behavior is programmed by a
 .I plumbing
 file (default
 .BR $HOME/lib/plumbing )
 in the format of
-.IM plumb (7) .
+.MR plumb (7) .
 .PP
 Its services are posted via
-.IM 9pserve (4)
+.MR 9pserve (4)
 as
 .BR plumb ,
 and consist of two
@@ -39,14 +39,14 @@ for dispatching messages to applications.
 Programs use
 .B fswrite
 (see
-.IM 9pclient (3) )
+.MR 9pclient (3) )
 to deliver messages to the
 .B send
 file, and
 .I fsread
 to receive them from the corresponding port.
 For example,
-.IM sam (1) 's
+.MR sam (1) 's
 .B plumb
 menu item or the
 .B B
@@ -115,13 +115,13 @@ statements
 .TP
 .B plumb
 mount name for
-.IM plumber (4) .
+.MR plumber (4) .
 .SH SOURCE
 .B \*9/src/cmd/plumb
 .SH "SEE ALSO"
-.IM plumb (1) ,
-.IM plumb (3) ,
-.IM plumb (7)
+.MR plumb (1) ,
+.MR plumb (3) ,
+.MR plumb (7)
 .\" .SH BUGS
 .\" .IR Plumber 's
 .\" file name space is fixed, so it is difficult to plumb