diff --git a/lib/c-api/src/wasm_c_api/types/memory.rs b/lib/c-api/src/wasm_c_api/types/memory.rs
index d38385b88e5..948ff6cf1ec 100644
--- a/lib/c-api/src/wasm_c_api/types/memory.rs
+++ b/lib/c-api/src/wasm_c_api/types/memory.rs
@@ -48,7 +48,7 @@ impl wasm_memorytype_t {
     }
 }
 
-wasm_declare_vec!(memorytype);
+wasm_declare_boxed_vec!(memorytype);
 
 #[no_mangle]
 pub unsafe extern "C" fn wasm_memorytype_new(limits: &wasm_limits_t) -> Box<wasm_memorytype_t> {