diff --git a/tests/fssum.c b/tests/fssum.c
index 8be44547..5dde9984 100644
--- a/tests/fssum.c
+++ b/tests/fssum.c
@@ -24,6 +24,7 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include <errno.h>
+#include <sys/sysmacros.h>
 #include <sys/stat.h>
 #include <assert.h>
 #include <time.h>