diff --git a/usr.sbin/bhyve/rfb.c b/usr.sbin/bhyve/rfb.c
--- a/usr.sbin/bhyve/rfb.c
+++ b/usr.sbin/bhyve/rfb.c
@@ -887,10 +887,12 @@
 	len = stream_read(cfd, buf, VERSION_LENGTH);
 	if (len == VERSION_LENGTH && !strncmp(vbuf, buf, VERSION_LENGTH - 2)) {
 		client_ver = buf[VERSION_LENGTH - 2];
-	}
-	if (client_ver != CVERS_3_8 && client_ver != CVERS_3_7) {
-		/* only recognize 3.3, 3.7 & 3.8. Others dflt to 3.3 */
-		client_ver = CVERS_3_3;
+		if (client_ver != CVERS_3_8 && client_ver != CVERS_3_7) {
+			/* only recognize 3.3, 3.7 & 3.8. Others dflt to 3.3 */
+			client_ver = CVERS_3_3;
+		}
+	} else {
+		goto done;
 	}
 
 	/* 2a. Send security type */