diff --git a/crates/cli-support/src/lib.rs b/crates/cli-support/src/lib.rs
old mode 100644
new mode 100755
index b144d85b..a3f3be17
--- a/crates/cli-support/src/lib.rs
+++ b/crates/cli-support/src/lib.rs
@@ -96,7 +96,7 @@ impl Bindgen {
             weak_refs: env::var("WASM_BINDGEN_WEAKREF").is_ok(),
             threads: threads_config(),
             anyref: anyref || wasm_interface_types,
-            multi_value,
+            multi_value: multi_value || wasm_interface_types,
             wasm_interface_types,
             encode_into: EncodeInto::Test,
         }