session MAINTENANCE add header file for compatibility with BSD
diff --git a/src/session_client.c b/src/session_client.c
index c429b99..9e814c7 100644
--- a/src/session_client.c
+++ b/src/session_client.c
@@ -16,6 +16,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
+#include <netinet/in.h>
 #include <pthread.h>
 #include <stdlib.h>
 #include <string.h>