diff --git a/src/dom.js b/src/dom.js
index e465d7ae2d25a..4307b41a6ba58 100644
--- a/src/dom.js
+++ b/src/dom.js
@@ -395,7 +395,7 @@ export function scopedQuerySelector(root, selector) {
   }
 
   // Only IE.
-  const unique = `i-amphtml-scoped-${Math.random()}`;
+  const unique = `i-amphtml-scoped-${Date.now()}`;
   root.classList.add(unique);
   const elements = root./*OK*/querySelector(`.${unique} ${selector}`);
   root.classList.remove(unique);
@@ -418,7 +418,7 @@ export function scopedQuerySelectorAll(root, selector) {
   }
 
   // Only IE.
-  const unique = `i-amphtml-scoped-${Math.random()}`;
+  const unique = `i-amphtml-scoped-${Date.now()}`;
   root.classList.add(unique);
   const elements = toArray(root./*OK*/querySelectorAll(`.${unique} ${selector}`));
   root.classList.remove(unique);