diff --git a/README.md b/README.md
index 630f1fc..79ac1a8 100644
--- a/README.md
+++ b/README.md
@@ -140,7 +140,7 @@ The default options are:
         // Can be redefined for each alert.
         "format": "short",
 
-        // Default query interval
+        // Default query interval and time window when "time_window" is unset
         // Can be redefined for each alert.
         "interval": "10minute",