diff --git a/man2/mount.2 b/man2/mount.2
index 87cb1a9b8..8d2a34742 100644
--- a/man2/mount.2
+++ b/man2/mount.2
@@ -650,6 +650,14 @@ or
 .BR EINVAL
 An attempt was made to bind mount an unbindable mount.
 .TP
+.BR EINVAL
+In an unpriviledged mount namespace, a bind operation
+.RB ( MS_BIND )
+was attempted without specifying
+.RB ( MS_REC ),
+which would have revealed the filesytem tree underneath one of
+the submounts of the directory being bound.
+.TP
 .B ELOOP
 Too many links encountered during pathname resolution.
 .TP