diff --git a/examples/real-world/src/middleware/api.js b/examples/real-world/src/middleware/api.js
index 3085b6c7e3..95d00ef76c 100644
--- a/examples/real-world/src/middleware/api.js
+++ b/examples/real-world/src/middleware/api.js
@@ -73,7 +73,7 @@ export const Schemas = {
 }
 
 // Action key that carries API call info interpreted by this Redux middleware.
-export const CALL_API = Symbol('Call API')
+export const CALL_API = 'Call API'
 
 // A Redux middleware that interprets actions with CALL_API info specified.
 // Performs the call and promises when such actions are dispatched.