diff --git a/man3/catgets.3 b/man3/catgets.3
index 047dd9afc..e252c725b 100644
--- a/man3/catgets.3
+++ b/man3/catgets.3
@@ -44,8 +44,8 @@ where
 .I catalog
 is a catalog descriptor returned from an earlier call to
 .BR catopen (3).
-The fourth argument
-.I message
+The fourth argument,
+.IR message ,
 points to a default message string which will be returned by
 .BR catgets ()
 if the identified message catalog is not currently available.