diff --git a/include/chaiscript/dispatchkit/bootstrap_stl.hpp b/include/chaiscript/dispatchkit/bootstrap_stl.hpp
index 7f409a3a..7785f9fb 100644
--- a/include/chaiscript/dispatchkit/bootstrap_stl.hpp
+++ b/include/chaiscript/dispatchkit/bootstrap_stl.hpp
@@ -706,6 +706,8 @@ namespace chaiscript
           m.add(fun([](const String *s, const String &f, size_t pos) { return s->find_last_of(f, pos); } ), "find_last_of");
           m.add(fun([](const String *s, const String &f, size_t pos) { return s->find_last_not_of(f, pos); } ), "find_last_not_of");
           m.add(fun([](const String *s, const String &f, size_t pos) { return s->find_first_not_of(f, pos); } ), "find_first_not_of");
+        
+          m.add(fun([](String *s, typename String::value_type c) -> decltype(auto) { return (*s += c); } ), "+=");
 
           m.add(fun([](String *s) { s->clear(); } ), "clear");
           m.add(fun([](const String *s) { return s->empty(); } ), "empty");