diff --git a/src/shared/mount-setup.c b/src/shared/mount-setup.c
index ef3527e..cc1ba23 100644
--- a/src/shared/mount-setup.c
+++ b/src/shared/mount-setup.c
@@ -32,6 +32,7 @@
 #include "strv.h"
 #include "user-util.h"
 #include "virt.h"
+#include "missing_type.h"
 
 typedef enum MountMode {
         MNT_NONE           = 0,