diff --git a/crates/execpolicy/src/lib.rs b/crates/execpolicy/src/lib.rs
index 1e6d1208..6dc52c32 100644
--- a/crates/execpolicy/src/lib.rs
+++ b/crates/execpolicy/src/lib.rs
@@ -172,6 +172,7 @@ impl ExecPolicyEngine {
             trusted_prefixes: vec![],
             denied_prefixes: vec![],
             approved_for_session: HashSet::new(),
+            arity_dict: BashArityDict::new(),
         }
     }