diff --git a/plugins/modbus/modbus_req.c b/plugins/modbus/modbus_req.c
index 9b29cc80f..e93cce646 100644
--- a/plugins/modbus/modbus_req.c
+++ b/plugins/modbus/modbus_req.c
@@ -698,7 +698,7 @@ static int process_protocol_buf(neu_plugin_t *plugin, uint8_t slave_id,
                 plog_recv_protocol(plugin, recv_buf, ret);
             }
             neu_protocol_unpack_buf_init(&pbuf, recv_buf, ret);
-            int ret_s = modbus_stack_recv(plugin->stack, 0, &pbuf);
+            int ret_s = modbus_stack_recv(plugin->stack, slave_id, &pbuf);
             if (ret_s == MODBUS_DEVICE_ERR) {
                 ret = ret_s;
             } else {
diff --git a/plugins/modbus/modbus_stack.c b/plugins/modbus/modbus_stack.c
index 94f4589fe..504691224 100644
--- a/plugins/modbus/modbus_stack.c
+++ b/plugins/modbus/modbus_stack.c
@@ -84,10 +84,8 @@ int modbus_stack_recv(modbus_stack_t *stack, uint8_t slave_id,
         return -1;
     }
 
-    if (stack->protocol == MODBUS_PROTOCOL_TCP) {
-        if (code.slave_id != slave_id) {
-            return -1;
-        }
+    if (code.slave_id != slave_id) {
+        return -1;
     }
 
     switch (code.function) {