diff --git a/metadata.cc b/metadata.cc
index bc7222b..1eec1cf 100644
--- a/metadata.cc
+++ b/metadata.cc
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include <base/string_util.h>
+#include <base/stringprintf.h>
 #include <et/com_err.h>
 #include <ext2fs/ext2_io.h>
 #include <ext2fs/ext2fs.h>