--- tests/regression/client/client.c    2022-10-04 17:06:09.291000000 +0200
+++ tests/regression/client/client.c    2022-10-04 17:04:53.477000000 +0200
@@ -29,6 +29,7 @@
 #include <sys/types.h>
 #include <sys/un.h>
 #include <unistd.h>
+#include <sys/socket.h>
 
 #include <context.h>
 #include <privkey.h>