diff --git a/README.md b/README.md
index 05b0f2a..ada64b7 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,8 @@ You will find the binary in `$GOPATH/bin` or, if set, `$GOBIN`.
 
 ## configuration
 
-The configuration is expected at `$HOME/.config/feed-to-muc/config.json` with this format:
+If the flag `-config` is not used tthe configuration expected at 
+`$HOME/.config/feed-to-muc/config.json` in this format:
 
 ```
 {