diff --git a/README.md b/README.md
index 6b29350..ac4226c 100644
--- a/README.md
+++ b/README.md
@@ -354,6 +354,14 @@ r.unwrap(:a)                                 # shortcut over unwrap([:a])
 r.where(predicate)                           # alias for restrict(predicate)
 ```
 
+## Supported Predicates
+
+See [Predicate gem](https://github.com/enspirit/predicate)
+
+Note: predicates that implement specific Ruby algorithms or patterns are
+not compiled to SQL (and more generally not delegated to underlying database
+servers).
+
 ## How is this different?
 
 ### ... from similar libraries?