diff --git a/lib/runtime-core/src/macros.rs b/lib/runtime-core/src/macros.rs
index 9da01c254..80be85478 100644
--- a/lib/runtime-core/src/macros.rs
+++ b/lib/runtime-core/src/macros.rs
@@ -38,7 +38,7 @@ macro_rules! __export_func_convert_type {
         Type::I64
     };
     (u64) => {
-        Type::I32
+        Type::I64
     };
     (f32) => {
         Type::F32