diff --git a/Lib/csharp/std_string.i b/Lib/csharp/std_string.i
index e7b0e240a..48957559e 100644
--- a/Lib/csharp/std_string.i
+++ b/Lib/csharp/std_string.i
@@ -19,6 +19,8 @@
 
 namespace std {
 
+%naturalvar string;
+
 class string;
 
 // string
diff --git a/Lib/java/std_string.i b/Lib/java/std_string.i
index c24997416..7c983b7f4 100644
--- a/Lib/java/std_string.i
+++ b/Lib/java/std_string.i
@@ -20,6 +20,8 @@
 
 namespace std {
 
+%naturalvar string;
+
 class string;
 
 // string
diff --git a/Lib/lua/std_string.i b/Lib/lua/std_string.i
index 69df787fb..459753e2d 100644
--- a/Lib/lua/std_string.i
+++ b/Lib/lua/std_string.i
@@ -26,6 +26,9 @@ s2=test_value(s)
 assert(s==s2)
 
 */
+
+%naturalvar std::string;
+
 %typemap(in,checkfn="lua_isstring") std::string
 %{$1 = (char*)lua_tostring(L, $input);%}