diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index 5124b4e3..6b081ee1 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -515,6 +515,7 @@
           java.util.Random
           java.util.regex.Matcher
           java.util.regex.Pattern
+          java.util.regex.PatternSyntaxException
           java.util.ArrayDeque
           java.util.ArrayList
           java.util.Collections