diff --git a/src/doc/guide.md b/src/doc/guide.md
index 92e054b55a19..446753a1c9cc 100644
--- a/src/doc/guide.md
+++ b/src/doc/guide.md
@@ -160,7 +160,7 @@ Save the file, and then type this into your terminal window:
 
 ```{bash}
 $ rustc hello_world.rs
-$ ./hello_world
+$ ./hello_world # just 'hello_world' on Windows
 Hello, world
 ```