diff --git a/core/state_transition.go b/core/state_transition.go
index 9c4f76d1c5..bda2a995bf 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -263,7 +263,7 @@ func (st *StateTransition) buyGas() error {
 	if err := st.gp.SubGas(st.msg.GasLimit); err != nil {
 		return err
 	}
-	st.gasRemaining += st.msg.GasLimit
+	st.gasRemaining = st.msg.GasLimit
 
 	st.initialGas = st.msg.GasLimit
 	mgvalU256, _ := uint256.FromBig(mgval)