diff --git a/man2/seteuid.2 b/man2/seteuid.2
index dea3ca364..1457d892e 100644
--- a/man2/seteuid.2
+++ b/man2/seteuid.2
@@ -128,7 +128,7 @@ need not permit
 .RI ( egid )
 to be the same value as the current effective user (group) ID,
 and some implementations do not permit this.
-
+.SS C library/kernel ABI differences
 On Linux,
 .BR seteuid ()
 and