diff --git a/moveos/moveos-wasm/src/middlewares/gas_metering.rs b/moveos/moveos-wasm/src/middlewares/gas_metering.rs
index a4271dfc70..3c1a42010b 100644
--- a/moveos/moveos-wasm/src/middlewares/gas_metering.rs
+++ b/moveos/moveos-wasm/src/middlewares/gas_metering.rs
@@ -59,7 +59,7 @@ impl ModuleMiddleware for GasMiddleware {
         let charge_function_index = self.charge_function_index.lock().unwrap().unwrap();
 
         Box::new(GasFunctionMiddleware {
-            charge_function_index: charge_function_index.clone(),
+            charge_function_index: charge_function_index,
             accumulated_cost: 0,
             cost_function: self.cost_function.clone(),
         })