# https://github.com/apertium/lttoolbox/commit/d2b0724fb26d033c8735356a486b3ef4dacebc83
--- lttoolbox/ustring.h.orig	2025-07-26 10:26:30
+++ lttoolbox/ustring.h	2025-11-30 06:54:25
@@ -26,6 +26,7 @@
 #include <vector>
 #include <cstdint>
 #include <iomanip>
+#include <ostream>
 
 typedef std::basic_string<UChar> UString;
 typedef std::basic_string_view<UChar> UStringView;