diff --git a/tests/api.c b/tests/api.c
index 1d4ca8fe15..d76b23b7ef 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -90351,7 +90351,7 @@ static void test_wolfSSL_dtls_plaintext_client(WOLFSSL* ssl)
     AssertIntEQ(send(fd, (MESSAGE_TYPE_CAST)ch, sizeof(ch), 0), sizeof(ch));
     generateDTLSMsg(ch, sizeof(ch), 20, client_hello, 10000);
     /* Server should ignore this datagram */
-    AssertIntEQ(send(fd, ch, sizeof(ch), 0), sizeof(ch));
+    AssertIntEQ(send(fd, (MESSAGE_TYPE_CAST)ch, sizeof(ch), 0), sizeof(ch));
 
     AssertIntEQ(wolfSSL_write(ssl, msg, sizeof(msg)), sizeof(msg));
     AssertIntGT(wolfSSL_read(ssl, reply, sizeof(reply)),0);