Controlling-Logging.md

@@ -10,5 +10,5 @@ logger levels by using for example `Routing.Outgoing:DEBUG` instead of the more
 A note on `DEBUG` logs. By default these are disabled due to performance considerations. In order to actually get DEBUG level logs you need to compile the image with the Cabal `debug` flag turned on, so:
 
 ```
-stack build --flag heimdoll:debug
+stack build --flag heimdall:debug
 ```