diff -Nrup a/service.h b/service.h
--- a/service.h	2018-10-15 12:42:08.000000000 -0600
+++ b/service.h	2019-09-23 10:15:16.089840039 -0600
@@ -13,6 +13,7 @@
 
 #include <list>
 #include <map>
+#include <string>
 
 //***************************************************************************
 // Timer - Skin Interface