diff --git a/man2/dup.2 b/man2/dup.2
index 36c255d11..b0870e476 100644
--- a/man2/dup.2
+++ b/man2/dup.2
@@ -93,7 +93,7 @@ The close-on-exec flag
 see
 .BR fcntl (2))
 for the duplicate descriptor is off.
-
+.SS dup3()
 .BR dup3 ()
 is the same as
 .BR dup2 (),