diff --git a/lib/adapters/fetch.js b/lib/adapters/fetch.js
index 91af945..6d3ceb0 100644
--- a/lib/adapters/fetch.js
+++ b/lib/adapters/fetch.js
@@ -164,7 +164,7 @@ export default isFetchSupported && (async (config) => {
 
     let response = await fetch(request);
 
-    const isStreamResponse = responseType === 'stream' || responseType === 'response';
+    const isStreamResponse = supportsResponseStream && (responseType === 'stream' || responseType === 'response');
 
     if (supportsResponseStream && (onDownloadProgress || isStreamResponse)) {
       const options = {};