diff --git a/glnx-backports.h b/glnx-backports.h
index c92ace46..09e4609a 100644
--- a/glnx-backports.h
+++ b/glnx-backports.h
@@ -28,6 +28,7 @@
 
 #include <string.h>
 
+#include <glib-unix.h>
 #include <gio/gio.h>
 
 G_BEGIN_DECLS