diff --git a/src/request.js b/src/request.js
index a63f7e606..38f33df33 100644
--- a/src/request.js
+++ b/src/request.js
@@ -280,7 +280,7 @@ export const getNodeRequestOptions = request => {
 
 	// HTTP-network-or-cache fetch step 2.15
 	if (request.compress && !headers.has('Accept-Encoding')) {
-		headers.set('Accept-Encoding', 'gzip,deflate,br');
+		headers.set('Accept-Encoding', 'gzip, deflate, br');
 	}
 
 	let {agent} = request;