diff --git a/src/basic/user-util.c b/src/basic/user-util.c
index fe61a09005..5c39847733 100644
--- a/src/basic/user-util.c
+++ b/src/basic/user-util.c
@@ -6,6 +6,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/file.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <utmp.h>