diff --git a/src/request.js b/src/request.js
index a63f7e606..d7904f321 100644
--- a/src/request.js
+++ b/src/request.js
@@ -65,7 +65,7 @@ export default class Request extends Body {
 			method = method.toUpperCase();
 		}
 
-		if ('data' in init) {
+		if (!isRequest(init) && 'data' in init) {
 			doBadDataWarn();
 		}