diff --git a/lib/mixins/template-stamp.html b/lib/mixins/template-stamp.html
index c67a154469..ffbadc4ac4 100644
--- a/lib/mixins/template-stamp.html
+++ b/lib/mixins/template-stamp.html
@@ -267,7 +267,7 @@
           // manually.
           next = node.nextSibling;
           if (node.nodeType === Node.TEXT_NODE) {
-            let /** @type Node */ n = next;
+            let /** Node */ n = next;
             while (n && (n.nodeType === Node.TEXT_NODE)) {
               node.textContent += n.textContent;
               next = n.nextSibling;
@@ -282,7 +282,7 @@
           }
           let childInfo = { parentIndex, parentInfo: nodeInfo };
           if (this._parseTemplateNode(node, templateInfo, childInfo)) {
-            childInfo.infoIndex = templateInfo.nodeInfoList.push(childInfo) - 1;
+            childInfo.infoIndex = templateInfo.nodeInfoList.push(/** @type {!NodeInfo} */(childInfo)) - 1;
           }
           // Increment if not removed
           if (node.parentNode) {
@@ -383,7 +383,7 @@
        * @return {DocumentFragment} Content fragment
        */
       static _contentForTemplate(template) {
-        let templateInfo = /** @type HTMLTemplateElementWithInfo */ (template)._templateInfo;
+        let templateInfo = /** @type {HTMLTemplateElementWithInfo} */ (template)._templateInfo;
         return (templateInfo && templateInfo.content) || template.content;
       }