diff --git a/test/default/secretbox_easy2.c b/test/default/secretbox_easy2.c
index 0ccc0f8f..7cacbd7a 100644
--- a/test/default/secretbox_easy2.c
+++ b/test/default/secretbox_easy2.c
@@ -22,7 +22,7 @@ main(void)
     k     = (unsigned char *) sodium_malloc(crypto_secretbox_KEYBYTES);
     mac   = (unsigned char *) sodium_malloc(crypto_secretbox_MACBYTES);
     crypto_secretbox_keygen(k);
-    randombytes_buf(m, (unsigned long long) mlen);
+    randombytes_buf(m, mlen);
     randombytes_buf(nonce, crypto_secretbox_NONCEBYTES);
     crypto_secretbox_easy(c, m, (unsigned long long) mlen, nonce, k);
     if (crypto_secretbox_open_easy(