1 files changed, 1 insertions, 3 deletions
diff --git a/lib/internal/wrapAsync.js b/lib/internal/wrapAsync.js
index c4d1ea8..2b1490c 100644
--- a/lib/internal/wrapAsync.js
+++ b/lib/internal/wrapAsync.js
@@ -1,9 +1,7 @@
 import asyncify from '../asyncify';
 
-var supportsSymbol = typeof Symbol === 'function';
-
 function isAsync(fn) {
-    return supportsSymbol && fn[Symbol.toStringTag] === 'AsyncFunction';
+    return fn[Symbol.toStringTag] === 'AsyncFunction';
 }
 
 function wrapAsync(asyncFn) {