diff --git a/crates/gen/src/parser/method_signature.rs b/crates/gen/src/parser/method_signature.rs
index 43277ba91a..26528bb856 100644
--- a/crates/gen/src/parser/method_signature.rs
+++ b/crates/gen/src/parser/method_signature.rs
@@ -480,7 +480,7 @@ impl MethodParam {
         let kind = self.signature.kind.gen_name(gen);
 
         if self.param.is_input() {
-            if self.signature.kind.is_primitive() {
+            if self.signature.kind.is_blittable() {
                 quote! { #name }
             } else {
                 quote! { &*(&#name as *const <#kind as ::windows::Abi>::Abi as *const <#kind as ::windows::Abi>::DefaultType) }
diff --git a/tests/implement/tests/com_chain.rs b/tests/implement/tests/com_chain.rs
index be5703f59b..34a3f9bb10 100644
--- a/tests/implement/tests/com_chain.rs
+++ b/tests/implement/tests/com_chain.rs
@@ -21,8 +21,7 @@ impl Test {
         Ok(())
     }
 
-    // TODO: should be able to declare BOOL without a reference.
-    fn Save(&self, _: &Option<IStream>, _: &BOOL) -> Result<()> {
+    fn Save(&self, _: &Option<IStream>, _: BOOL) -> Result<()> {
         Ok(())
     }