diff --git a/man2/syscalls.2 b/man2/syscalls.2
index 31f9cb392..d2bc54a45 100644
--- a/man2/syscalls.2
+++ b/man2/syscalls.2
@@ -130,6 +130,8 @@ Starting with kernel 2.6.0, the development model changed,
 and new system calls may appear in each 2.6.x release.
 In this case, the exact version number where the system call appeared
 is shown.
+This convention continues with the 3.x kernel series,
+which followed on from kernel 2.6.39.
 .IP *
 In some cases, a system call was added to a stable kernel
 series after it branched from the previous stable kernel