diff --git a/src/tcp_sample.c b/src/tcp_sample.c
index 8242fa4..0ea7d79 100644
--- a/src/tcp_sample.c
+++ b/src/tcp_sample.c
@@ -33,11 +33,13 @@
 #include <haproxy/api.h>
 #include <haproxy/arg.h>
 #include <haproxy/connection.h>
+#include <haproxy/errors.h>
 #include <haproxy/global.h>
 #include <haproxy/listener-t.h>
 #include <haproxy/namespace.h>
 #include <haproxy/proxy-t.h>
 #include <haproxy/sample.h>
+#include <haproxy/session-t.h>
 #include <haproxy/tools.h>