diff --git a/ethereal/debugger.go b/ethereal/debugger.go
index 4161558359..763b26063c 100644
--- a/ethereal/debugger.go
+++ b/ethereal/debugger.go
@@ -124,11 +124,12 @@ func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, data
 		Value:       ethutil.Big(valueStr),
 	})
 	vm.Verbose = true
+	vm.Hook = self.Db.halting
 
 	self.Db.done = false
 	self.Logf("callsize %d", len(script))
 	go func() {
-		ret, g, err := callerClosure.Call(vm, data, self.Db.halting)
+		ret, g, err := callerClosure.Call(vm, data)
 		tot := new(big.Int).Mul(g, gasPrice)
 		self.Logf("gas usage %v total price = %v (%v)", g, tot, ethutil.CurrencyToString(tot))
 		if err != nil {