--- kea-1.8.2/src/lib/dhcpsrv/timer_mgr.cc
+++ kea-1.8.2/src/lib/dhcpsrv/timer_mgr.cc
@@ -9,6 +9,7 @@
 #include <asiolink/io_service.h>
 #include <dhcpsrv/dhcpsrv_log.h>
 #include <dhcpsrv/timer_mgr.h>
+#include <map>
 #include <exceptions/exceptions.h>
 
 #include <functional>