diff --git a/dynamic-check/src/errors/type_assertion.rs b/dynamic-check/src/errors/type_assertion.rs
index 04ce0c7c3f..f776ea4b02 100644
--- a/dynamic-check/src/errors/type_assertion.rs
+++ b/dynamic-check/src/errors/type_assertion.rs
@@ -57,7 +57,7 @@ impl TypeAssertionError {
     ///
     /// Given type is not a member of the set of expected types.
     ///
-    pub fn membership_failed(given: &Type, set: &Vec<Type>, span: &Span) -> Self {
+    pub fn membership_failed(given: &Type, set: &[Type], span: &Span) -> Self {
         let message = format!(
             "Mismatched types. Given type `{}` is not in the expected type set `{:?}`.",
             given, set