1 files changed, 1 insertions, 0 deletions
diff --git a/src/string_func.h b/src/string_func.h
index 6c226c610..13e14f2d3 100644
--- a/src/string_func.h
+++ b/src/string_func.h
@@ -46,6 +46,7 @@ void ValidateString(const char *str);
 void str_fix_scc_encoded(char *str, const char *last);
 void str_strip_colours(char *str);
 bool strtolower(char *str);
+bool strtolower(std::string &str, std::string::size_type offs = 0);
 
 bool StrValid(const char *str, const char *last);