diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c
index efd43b47b8a7c18d83ab14c4355a7de08f63492d..53dfaa292c102afb5896c814e34cd2e728263b3d 100644
--- a/hw/net/net_tx_pkt.c
+++ b/hw/net/net_tx_pkt.c
@@ -590,7 +590,7 @@ static bool net_tx_pkt_do_sw_fragmentation(struct NetTxPkt *pkt,
 
         fragment_offset += fragment_len;
 
-    } while (more_frags);
+    } while (fragment_len && more_frags);
 
     return true;
 }