diff --git a/man2/clone.2 b/man2/clone.2
index a135a34ad..8fc9fc355 100644
--- a/man2/clone.2
+++ b/man2/clone.2
@@ -632,6 +632,11 @@ flag implied the
 .B CLONE_PARENT 
 flag (as in kernel 2.6).
 
+On x86,
+.BR clone ()
+should not be called through vsyscall, but directly through
+.IR "int $0x80" .
+
 .SH "CONFORMING TO"
 The
 .BR clone ()