Doc: fixed missing 'void'

diff --git a/doc/crypto_sha512.3monocypher b/doc/crypto_sha512.3monocypher
index d03578e4e742eb548f2680a1121f962895155ae6..b4da65734f4d9e8b13736028892760c2b9ca94cc 100644 (file)
--- a/doc/crypto_sha512.3monocypher
+++ b/doc/crypto_sha512.3monocypher
@@ -112,6 +112,7 @@
 .Fa "crypto_sha512_hmac_ctx *ctx"
 .Fa "uint8_t hmac[64]"
 .Fc
+.Ft void
 .Fo crypto_sha512_hkdf
 .Fa "uint8_t *okm"
 .Fa "size_t okm_size"