diff --git a/lib/output.js b/lib/output.js
index 674ae4db..dd40972e 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -870,6 +870,8 @@ function OutputStream(options) {
             }
         }
         output.print(".");
+        // the name after dot would be mapped about here.
+        output.add_mapping(self.end);
         output.print_name(self.property);
     });
     DEFPRINT(AST_Sub, function(self, output){
@@ -1106,11 +1108,13 @@ function OutputStream(options) {
     DEFMAP(AST_Symbol, basic_sourcemap_gen);
     DEFMAP(AST_Jump, basic_sourcemap_gen);
     DEFMAP(AST_StatementWithBody, basic_sourcemap_gen);
+    DEFMAP(AST_LabeledStatement, noop); // since the label symbol will mark it
     DEFMAP(AST_Lambda, basic_sourcemap_gen);
-    DEFMAP(AST_PropAccess, basic_sourcemap_gen);
     DEFMAP(AST_Switch, basic_sourcemap_gen);
+    DEFMAP(AST_SwitchBranch, basic_sourcemap_gen);
     DEFMAP(AST_BlockStatement, basic_sourcemap_gen);
     DEFMAP(AST_Toplevel, noop);
+    DEFMAP(AST_New, basic_sourcemap_gen);
     DEFMAP(AST_Try, basic_sourcemap_gen);
     DEFMAP(AST_Catch, basic_sourcemap_gen);
     DEFMAP(AST_Finally, basic_sourcemap_gen);