Index: src/libslic3r/LocalesUtils.cpp
--- src/libslic3r/LocalesUtils.cpp.orig
+++ src/libslic3r/LocalesUtils.cpp
@@ -4,6 +4,7 @@
     #include <charconv>
 #endif
 #include <stdexcept>
+#include <sstream>
 
 #include <fast_float/fast_float.h>
 
