diff -Naur libassuan-2.5.5/src/assuan-socket.c libassuan-2.5.5.serenity/src/assuan-socket.c
--- libassuan-2.5.5/src/assuan-socket.c	2021-04-14 02:38:16.911542870 +0200
+++ libassuan-2.5.5.serenity/src/assuan-socket.c	2021-04-14 02:37:37.497571703 +0200
@@ -34,6 +34,7 @@
 #endif
 #else
 # include <sys/types.h>
+# include <sys/time.h>
 # include <sys/socket.h>
 # include <netinet/in.h>
 # include <arpa/inet.h>