diff --git a/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c b/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
index da4a170c..6a637eca 100644
--- a/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
+++ b/src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
@@ -56,7 +56,8 @@ crypto_generichash_blake2b_init(crypto_generichash_blake2b_state *state,
         if (blake2b_init(state, (uint8_t) outlen) != 0) {
             return -1;
         }
-    } else if (blake2b_init_key(state, (uint8_t) outlen, key, keylen) != 0) {
+    } else if (blake2b_init_key(state, (uint8_t) outlen, key,
+                                (uint8_t) keylen) != 0) {
         return -1;
     }
     return 0;
@@ -81,7 +82,8 @@ crypto_generichash_blake2b_init_salt_personal(crypto_generichash_blake2b_state *
             return -1;
         }
     } else if (blake2b_init_key_salt_personal(state,
-                                              (uint8_t) outlen, key, keylen,
+                                              (uint8_t) outlen, key,
+                                              (uint8_t) keylen,
                                               salt, personal) != 0) {
         return -1;
     }