diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index 4b4219fe..80763245 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -125,6 +125,7 @@
           java.lang.Integer
           java.lang.Iterable
           java.lang.Long
+          java.lang.NullPointerException
           java.lang.Number
           java.lang.NumberFormatException
           java.lang.Math