diff --git a/lib/elements/array-selector.html b/lib/elements/array-selector.html
index 436983a016..af5ea9d02a 100644
--- a/lib/elements/array-selector.html
+++ b/lib/elements/array-selector.html
@@ -433,6 +433,8 @@
     static get is() { return 'array-selector'; }
   }
   customElements.define(ArraySelector.is, ArraySelector);
+
+  /** @const */
   Polymer.ArraySelector = ArraySelector;
 
 })();
diff --git a/lib/elements/custom-style.html b/lib/elements/custom-style.html
index 67c3f657e5..a4c65ec7c2 100644
--- a/lib/elements/custom-style.html
+++ b/lib/elements/custom-style.html
@@ -109,6 +109,8 @@
   }
 
   window.customElements.define('custom-style', CustomStyle);
+
+  /** @const */
   Polymer.CustomStyle = CustomStyle;
 })();
 </script>
diff --git a/lib/elements/dom-bind.html b/lib/elements/dom-bind.html
index 8b64cca385..1e7475aaf8 100644
--- a/lib/elements/dom-bind.html
+++ b/lib/elements/dom-bind.html
@@ -132,6 +132,7 @@
 
     customElements.define('dom-bind', DomBind);
 
+    /** @const */
     Polymer.DomBind = DomBind;
 
   })();
diff --git a/lib/elements/dom-if.html b/lib/elements/dom-if.html
index 527ede86ae..dc41e243a4 100644
--- a/lib/elements/dom-if.html
+++ b/lib/elements/dom-if.html
@@ -282,6 +282,7 @@
 
   customElements.define(DomIf.is, DomIf);
 
+  /** @const */
   Polymer.DomIf = DomIf;
 
 })();
diff --git a/lib/elements/dom-module.html b/lib/elements/dom-module.html
index 01aad394c8..cb06b25aba 100644
--- a/lib/elements/dom-module.html
+++ b/lib/elements/dom-module.html
@@ -139,7 +139,7 @@
 
   customElements.define('dom-module', DomModule);
 
-  // export
+  /** @const */
   Polymer.DomModule = DomModule;
 
 })();
diff --git a/lib/elements/dom-repeat.html b/lib/elements/dom-repeat.html
index f14f88f7a7..7302a3a7ed 100644
--- a/lib/elements/dom-repeat.html
+++ b/lib/elements/dom-repeat.html
@@ -731,6 +731,7 @@
 
   customElements.define(DomRepeat.is, DomRepeat);
 
+  /** @const */
   Polymer.DomRepeat = DomRepeat;
 
 })();