diff --git a/keyserver/src/push/providers.js b/keyserver/src/push/providers.js
--- a/keyserver/src/push/providers.js
+++ b/keyserver/src/push/providers.js
@@ -154,11 +154,12 @@
 let wnsAccessToken: ?WNSAccessToken = null;
 async function getWNSToken(): Promise<?string> {
   const expiryWindowInMs = 10_000;
+  const localWNSAccessToken = wnsAccessToken;
   if (
-    wnsAccessToken &&
-    wnsAccessToken.expires >= Date.now() - expiryWindowInMs
+    localWNSAccessToken &&
+    localWNSAccessToken.expires >= Date.now() - expiryWindowInMs
   ) {
-    return wnsAccessToken.token;
+    return localWNSAccessToken.token;
   }
 
   const config = await getCommConfig<WNSConfig>({