diff --git a/include/net/eth.h b/include/net/eth.h
index 14c34f530f..63f598d7cd 100644
--- a/include/net/eth.h
+++ b/include/net/eth.h
@@ -39,7 +39,7 @@ struct eth_header {
     uint8_t  h_dest[ETH_ALEN];   /* destination eth addr */
     uint8_t  h_source[ETH_ALEN]; /* source ether addr    */
     uint16_t h_proto;            /* packet type ID field */
-};
+} QEMU_PACKED;
 
 struct vlan_header {
     uint16_t  h_tci;     /* priority and VLAN ID  */