diff --git a/man2/close.2 b/man2/close.2
index 37ab68aea..5427db56b 100644
--- a/man2/close.2
+++ b/man2/close.2
@@ -75,6 +75,8 @@ is set appropriately.
 isn't a valid open file descriptor.
 .TP
 .B EINTR
+.\" Though, it's in doubt whether this error can ever occur; see
+.\" https://lwn.net/Articles/576478/ "Returning EINTR from close()"
 The
 .BR close ()
 call was interrupted by a signal; see