diff --git a/gio/tests/test-pipe-unix.c b/gio/tests/test-pipe-unix.c
index 07f6198a9..4b348db52 100644
--- a/gio/tests/test-pipe-unix.c
+++ b/gio/tests/test-pipe-unix.c
@@ -27,6 +27,7 @@
 #include <gio/gio.h>
 
 #include "test-io-stream.h"
+#include "test-pipe-unix.h"
 
 #ifdef G_OS_UNIX
 #   include <gio/gunixinputstream.h>