diff --git a/language/predefined/interfaces.xml b/language/predefined/interfaces.xml
index 19f0305d07..d0ea08c022 100644
--- a/language/predefined/interfaces.xml
+++ b/language/predefined/interfaces.xml
@@ -14,6 +14,7 @@
  &language.predefined.traversable;
  &language.predefined.iterator;
  &language.predefined.iteratoraggregate;
+ &language.predefined.throwable;
  &language.predefined.arrayaccess;
  &language.predefined.serializable;
  &language.predefined.closure;