diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 08d90fba952c3e1ba07e0fa488012aa26a6b473c..26e0164895e46aacd28e7f8a749d6ecda213ded0 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -13,6 +13,7 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/un.h>
+#include <sys/types.h>
 #include <os.h>
 
 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)