diff --git a/modules/access/http/h2output_test.c b/modules/access/http/h2output_test.c
index bc3b393e26..2021512e4c 100644
--- a/modules/access/http/h2output_test.c
+++ b/modules/access/http/h2output_test.c
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <vlc_common.h>
+#include <vlc_threads.h>
 #include <vlc_tls.h>
 #include "h2frame.h"
 #include "h2output.h"