Manual: void returns cannot fail

diff --git a/doc/man/man3/crypto_blake2b.3monocypher b/doc/man/man3/crypto_blake2b.3monocypher
index 60eaf747515c7b26d1a589cec00de7cf3af6ed32..3904d2247ac3649ef113ef846ba3887df259050c 100644 (file)
--- a/doc/man/man3/crypto_blake2b.3monocypher
+++ b/doc/man/man3/crypto_blake2b.3monocypher
@@ -155,6 +155,7 @@ specifies a 64-byte hash and no key.
 This is considered a good default.
 .Sh RETURN VALUES
 These functions return nothing.
+They cannot fail.
 .Sh EXAMPLES
 Hashing a message all at once:
 .Bd -literal -offset indent