diff -Nrup a/src/utils/sortutil.h b/src/utils/sortutil.h
--- a/src/utils/sortutil.h	2018-09-04 15:36:54.000000000 -0600
+++ b/src/utils/sortutil.h	2019-09-23 10:22:00.403342300 -0600
@@ -4,6 +4,7 @@
 #define SPRINGLOBBY_SORTUTIL_H_INCLUDED
 
 #include <map>
+#include <string>
 //! set direction to +1 for down, -1 for up
 struct SortOrderItem
 {