diff --git a/src/UpdateDatabase.cxx b/src/UpdateDatabase.cxx
index 5dd2bb..6c8da9 100644
--- a/src/UpdateDatabase.cxx
+++ b/src/UpdateDatabase.cxx
@@ -27,6 +27,7 @@
 
 #include <assert.h>
 #include <stddef.h>
+#include <stdint.h>
 
 void
 delete_song(Directory &dir, Song *del)