1 files changed, 12 insertions, 0 deletions
diff --git a/string.c b/string.c
index b9399c2fd1..01f3f03d15 100644
--- a/string.c
+++ b/string.c
@@ -2754,6 +2754,18 @@ rb_str_center(str, w)
 }
 
 void
+rb_str_setter(val, id, var)
+    VALUE val;
+    ID id;
+    VALUE *var;
+{
+    if (!NIL_P(val) && TYPE(val) != T_STRING) {
+	rb_raise(rb_eTypeError, "value of %s must be String", rb_id2name(id));
+    }
+    *var = val;
+}
+
+void
 Init_String()
 {
     rb_cString  = rb_define_class("String", rb_cObject);