diff --git a/lib/web/fetch/index.js b/lib/web/fetch/index.js
index d8c20c59bf7..a3654271183 100644
--- a/lib/web/fetch/index.js
+++ b/lib/web/fetch/index.js
@@ -2230,7 +2230,7 @@ async function httpNetworkFetch (
 
           //  4. See pullAlgorithm...
 
-          return this.body.push(bytes)
+          return this.body ? this.body.push(bytes) : false
         },
 
         onComplete () {