ext/json/ext/parser/parser.rl in json_pure-2.0.2 vs ext/json/ext/parser/parser.rl in json_pure-2.0.3

@@ -568,10 +568,10 @@
     if (OBJ_FROZEN(source)) {
       source = rb_str_dup(source);
     }
     FORCE_UTF8(source);
   } else {
-    source = rb_str_conv_enc(source, NULL, rb_utf8_encoding());
+    source = rb_str_conv_enc(source, rb_enc_get(source), rb_utf8_encoding());
   }
 #endif
     return source;
 }