diff --git a/doc/man3/EVP_PKEY_CTX_set_hkdf_md.pod b/doc/man3/EVP_PKEY_CTX_set_hkdf_md.pod
index 12843d014e2715821513c6c78305dd66630a0e30..333b8da0fd5f99fcf69c84cd289866c948c72f60 100644
--- a/doc/man3/EVP_PKEY_CTX_set_hkdf_md.pod
+++ b/doc/man3/EVP_PKEY_CTX_set_hkdf_md.pod
@@ -139,7 +139,7 @@ salt value "salt" and info value "label":
      /* Error */
  if (EVP_PKEY_CTX_set1_hkdf_key(pctx, "secret", 6) <= 0)
      /* Error */
- if (EVP_PKEY_CTX_add1_hkdf_info(pctx, "label", 6) <= 0)
+ if (EVP_PKEY_CTX_add1_hkdf_info(pctx, "label", 5) <= 0)
      /* Error */
  if (EVP_PKEY_derive(pctx, out, &outlen) <= 0)
      /* Error */