diff --git a/README.md b/README.md
index 4c24797..4372319 100644
--- a/README.md
+++ b/README.md
@@ -52,4 +52,8 @@ Predefined Categories
    choose to generate generic loot.
  - ```valuable```: Used for particularly valuable loot, such as precious stones
    or metals. Dungeons and loot vault chests are guaranteed to contain at least
-   one of these.
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+   one of these.
+
+<br/>
+You do not need to define a category before using it; simply put it in your
+loot's weights table.
\ No newline at end of file