--- zzzz-none-000/linux-4.4.60/include/uapi/linux/tcp.h	2017-04-08 07:53:53.000000000 +0000
+++ wasp-540e-714/linux-4.4.60/include/uapi/linux/tcp.h	2019-07-03 09:21:34.000000000 +0000
@@ -54,7 +54,7 @@
 	__be16	window;
 	__sum16	check;
 	__be16	urg_ptr;
-};
+} __attribute__((packed, aligned(2)));
 
 /*
  *	The union cast uses a gcc extension to avoid aliasing problems
@@ -64,7 +64,7 @@
 union tcp_word_hdr { 
 	struct tcphdr hdr;
 	__be32 		  words[5];
-}; 
+} __attribute__((packed, aligned(2)));
 
 #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])