diff --git a/man2/sched_setaffinity.2 b/man2/sched_setaffinity.2
index 2b6c62be0..d4c9d46e9 100644
--- a/man2/sched_setaffinity.2
+++ b/man2/sched_setaffinity.2
@@ -197,7 +197,7 @@ A child created via
 inherits its parent's CPU affinity mask.
 The affinity mask is preserved across an
 .BR execve (2).
-
+.SS C library/kernel ABI differences
 This manual page describes the glibc interface for the CPU affinity calls.
 The actual system call interface is slightly different, with the
 .I mask