diff --git a/platform/qt/dmxwidget/dmxwidget.cpp b/platform/qt/dmxwidget/dmxwidget.cpp
index 751bef7..085538c 100644
--- a/platform/qt/dmxwidget/dmxwidget.cpp
+++ b/platform/qt/dmxwidget/dmxwidget.cpp
@@ -120,8 +120,9 @@ void DmxWidget::sendMessage(std::shared_ptr<ENTTEC::Pro::MessageData> msg) const
   uint16_t length = msg->streamSize();
   const int fixed_length = 5;
 
-  uint8_t buffer[length + fixed_length];
-  std::shared_ptr<bufferstream> stream(new bufferstream(buffer, sizeof(buffer),
+  char buffer[length + fixed_length];
+  std::shared_ptr<bufferstream> stream(new bufferstream(reinterpret_cast<uint8_t*>(buffer),
+                                                        sizeof(buffer),
                                                         bufferstream::LittleEndian));
   *stream << ENTTEC::Pro::START_DELIMITER;
   *stream << msg->label;
@@ -130,7 +131,7 @@ void DmxWidget::sendMessage(std::shared_ptr<ENTTEC::Pro::MessageData> msg) const
     *stream << msg;
   *stream << ENTTEC::Pro::END_DELIMITER;
 
-  port_->write(reinterpret_cast<char*>(buffer), sizeof(buffer));
+  port_->write(buffer, sizeof(buffer));
 }