diff --git a/lib/fetch/index.js b/lib/fetch/index.js
index 4168047e803..516f7e5c56b 100644
--- a/lib/fetch/index.js
+++ b/lib/fetch/index.js
@@ -1982,7 +1982,7 @@ async function httpNetworkFetch (
 
           // For H2, the headers are a plain JS object
           // We distinguish between them and iterate accordingly
-          if (Array.isArray(headers)) {
+          if (Array.isArray(headersList)) {
             for (let n = 0; n < headersList.length; n += 2) {
               const key = headersList[n + 0].toString('latin1')
               const val = headersList[n + 1].toString('latin1')