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--- a/libupnpp/control/avlastchg.hxx
+++ b/libupnpp/control/avlastchg.hxx
@@ -19,6 +19,7 @@
 
 #include "libupnpp/config.h"
 
+#include UNORDERED_MAP_INCLUDE
 #include <string>                       // for string
 
 namespace UPnPClient {