diff --git a/vm/state.go b/vm/state.go
index 9bf4c57..f615751 100644
--- a/vm/state.go
+++ b/vm/state.go
@@ -39,7 +39,7 @@ func NewStateFromByteCode(byteCodes [][]byte) (*State, error) {
 	return NewState(functions)
 }
 
-func (state *State) Execute() {
+func (state *State) Execute() error {
 	state.setHandlers()
 	state.call(0)
 	state.running = true
@@ -47,6 +47,8 @@ func (state *State) Execute() {
 	for state.running {
 		state.processInstruction()
 	}
+
+	return state.err
 }
 
 func (state *State) stackFrame() *stackFrame {