diff --git a/hw/net/mipsnet.c b/hw/net/mipsnet.c
index f261011..e134b31 100644
--- a/hw/net/mipsnet.c
+++ b/hw/net/mipsnet.c
@@ -82,6 +82,9 @@ static ssize_t mipsnet_receive(NetClientState *nc, const 
uint8_t *buf, size_t si
     if (!mipsnet_can_receive(nc))
         return 0;
 
+    if (size >= sizeof(s->rx_buffer)) {
+        return 0;
+    }
     s->busy = 1;
 
     /* Just accept everything. */
-- 
2.5.5
