diff --git a/doc/m2ref.doc b/doc/m2ref.doc
index 3f3a001c9..d369c9449 100644
--- a/doc/m2ref.doc
+++ b/doc/m2ref.doc
@@ -422,4 +422,4 @@ UNIX manual \fImodula-2\fP(1)
 .IP [6]
 UNIX manual \fIem_m2\fP(6)
 .IP [7]
-UNIX manual \fm2mm\fP(1)
+UNIX manual \fIm2mm\fP(1)