diff --git a/README.md b/README.md
index 76ce76dc..924366db 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,7 @@ The following predicates are built-in to rusty-wam.
 * duplicate_term/2
 * false/0
 * not/1
+* throw/1
 * var/1
 
 ## Tutorial