diff --git a/src/RemoteTagCache.hxx b/src/RemoteTagCache.hxx
index ed87f9706..e8b198a21 100644
--- a/src/RemoteTagCache.hxx
+++ b/src/RemoteTagCache.hxx
@@ -28,7 +28,11 @@
 #include <boost/intrusive/list.hpp>
 #include <boost/intrusive/unordered_set.hpp>
 
+#include <array>
+#include <functional>
+#include <memory>
 #include <string>
+#include <utility>
 
 class RemoteTagCacheHandler;