diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index 6268bd0f..bd2a70d8 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -805,6 +805,7 @@
     Number java.lang.Number
     NumberFormatException java.lang.NumberFormatException
     Object java.lang.Object
+    Runnable java.lang.Runnable
     Runtime java.lang.Runtime
     RuntimeException java.lang.RuntimeException
     Process java.lang.Process