diff --git a/companion/src/flashfirmwaredialog.cpp b/companion/src/flashfirmwaredialog.cpp
index a6ee513ca..9ce7efe70 100644
--- a/companion/src/flashfirmwaredialog.cpp
+++ b/companion/src/flashfirmwaredialog.cpp
@@ -124,7 +124,7 @@ void FlashFirmwareDialog::on_firmwareLoad_clicked()
   QString fileName = QFileDialog::getOpenFileName(this, tr("Open Firmware File"), g.flashDir(), FLASH_FILES_FILTER);
   if (!fileName.isEmpty()) {
     fwName = fileName;
-    if (!fwName.isEmpty() && !FirmwareInterface(fwName).isValid()) {
+    if (!fwName.isEmpty() && !fwName.endsWith(".dfu") && !FirmwareInterface(fwName).isValid()) {
       QMessageBox::warning(this, tr("Warning"), tr("%1 may not be a valid firmware file").arg(fwName));
     }
     updateUI();
diff --git a/companion/src/flashfirmwaredialog.h b/companion/src/flashfirmwaredialog.h
index 78a70f397..883ec429d 100644
--- a/companion/src/flashfirmwaredialog.h
+++ b/companion/src/flashfirmwaredialog.h
@@ -8,9 +8,10 @@
 
 #define HEX_FILES_FILTER              "HEX files (*.hex);;"
 #define BIN_FILES_FILTER              "BIN files (*.bin);;"
+#define DFU_FILES_FILTER              "DFU files (*.dfu);;"
 #define EEPE_FILES_FILTER             "EEPE EEPROM files (*.eepe);;"
 #define EEPROM_FILES_FILTER           "EEPE files (*.eepe *.bin *.hex);;" EEPE_FILES_FILTER BIN_FILES_FILTER HEX_FILES_FILTER
-#define FLASH_FILES_FILTER            "FLASH files (*.bin *.hex);;" BIN_FILES_FILTER HEX_FILES_FILTER
+#define FLASH_FILES_FILTER            "FLASH files (*.bin *.hex *.dfu);;" BIN_FILES_FILTER HEX_FILES_FILTER DFU_FILES_FILTER
 #define EXTERNAL_EEPROM_FILES_FILTER  "EEPROM files (*.bin *.hex);;" BIN_FILES_FILTER HEX_FILES_FILTER
 #define ER9X_EEPROM_FILE_TYPE         "ER9X_EEPROM_FILE"
 #define EEPE_EEPROM_FILE_HEADER       "EEPE EEPROM FILE"
diff --git a/companion/src/radiointerface.cpp b/companion/src/radiointerface.cpp
index 2bfec44ab..7dec64b7c 100644
--- a/companion/src/radiointerface.cpp
+++ b/companion/src/radiointerface.cpp
@@ -62,18 +62,20 @@ QStringList getAvrdudeArgs(const QString &cmd, const QString &filename)
 
 QStringList getDfuArgs(const QString & cmd, const QString & filename)
 {
-  QStringList arguments;
+  QStringList args;
   burnConfigDialog bcd;
   QString memory = "0x08000000";
   if (cmd == "-U") {
     memory.append(QString(":%1").arg(MAX_FSIZE));
   }
-  arguments << bcd.getDFUArgs() << "--dfuse-address" << memory; // removed for Horus, is it really needed? << "-d" << "0483:df11";
+  args << bcd.getDFUArgs();
+  if (!filename.endsWith(".dfu")) {
+    args << "--dfuse-address" << memory;
+  }
+  // removed for Horus, is it really needed? args << "-d" << "0483:df11";
   QString fullcmd = cmd + filename;
-
-  arguments << "" << fullcmd;
-
-  return arguments;
+  args << "" << fullcmd;
+  return args;
 }
 
 QStringList getSambaArgs(const QString &tcl)