4 files changed, 5 insertions, 5 deletions
diff --git a/src/include/ipxe/fc.h b/src/include/ipxe/fc.h
index 6689f394..6fdef092 100644
--- a/src/include/ipxe/fc.h
+++ b/src/include/ipxe/fc.h
@@ -60,7 +60,7 @@ struct sockaddr_fc {
 	 */
 	char pad[ sizeof ( struct sockaddr ) - sizeof ( sa_family_t )
 					     - sizeof ( struct fc_port_id ) ];
-} __attribute__ (( may_alias ));
+} __attribute__ (( packed, may_alias ));
 
 extern struct fc_port_id fc_empty_port_id;
 extern struct fc_port_id fc_f_port_id;
diff --git a/src/include/ipxe/in.h b/src/include/ipxe/in.h
index 0f19bbd7..36032470 100644
--- a/src/include/ipxe/in.h
+++ b/src/include/ipxe/in.h
@@ -88,7 +88,7 @@ struct sockaddr_in {
 		    sizeof ( uint16_t ) /* sin_flags */ +
 		    sizeof ( uint16_t ) /* sin_port */ +
 		    sizeof ( struct in_addr ) /* sin_addr */ ) ];
-} __attribute__ (( may_alias ));
+} __attribute__ (( packed, may_alias ));
 
 /**
  * IPv6 socket address
@@ -122,7 +122,7 @@ struct sockaddr_in6 {
 		    sizeof ( uint16_t ) /* sin6_port */ +
 		    sizeof ( uint16_t ) /* sin6_scope_id */ +
 		    sizeof ( struct in6_addr ) /* sin6_addr */ ) ];
-} __attribute__ (( may_alias ));
+} __attribute__ (( packed, may_alias ));
 
 extern int inet_aton ( const char *cp, struct in_addr *inp );
 extern char * inet_ntoa ( struct in_addr in );
diff --git a/src/include/ipxe/socket.h b/src/include/ipxe/socket.h
index d4cde2ef..7cb3912f 100644
--- a/src/include/ipxe/socket.h
+++ b/src/include/ipxe/socket.h
@@ -106,7 +106,7 @@ struct sockaddr {
 	 * family.
 	 */
 	char pad[ SA_LEN - sizeof ( sa_family_t ) ];
-} __attribute__ (( may_alias ));
+} __attribute__ (( packed, may_alias ));
 
 /**
  * Socket address converter
diff --git a/src/include/ipxe/tcpip.h b/src/include/ipxe/tcpip.h
index b2c559e2..fdfbae11 100644
--- a/src/include/ipxe/tcpip.h
+++ b/src/include/ipxe/tcpip.h
@@ -57,7 +57,7 @@ struct sockaddr_tcpip {
 		  ( sizeof ( sa_family_t ) /* st_family */ +
 		    sizeof ( uint16_t ) /* st_flags */ +
 		    sizeof ( uint16_t ) /* st_port */ ) ];
-} __attribute__ (( may_alias ));
+} __attribute__ (( packed, may_alias ));
 
 /** 
  * A transport-layer protocol of the TCP/IP stack (eg. UDP, TCP, etc)