diff --git a/markdown/docs/user-guide.md b/markdown/docs/user-guide.md
index fff110a..bf6637b 100644
--- a/markdown/docs/user-guide.md
+++ b/markdown/docs/user-guide.md
@@ -748,7 +748,7 @@ The server offers an [Express middleware][express] that can be integrated into a
 
 ```javascript
 var server = new FastBootServer({
-  appFiles: [appFile, appFile-fastboot],
+  appFiles: [appFile, appFastBootFile],
   vendorFiles: [vendorFile],
   htmlFile: htmlFile,
   ui: ui