diff --git a/xs/src/slic3r/GUI/FirmwareDialog.cpp b/xs/src/slic3r/GUI/FirmwareDialog.cpp
index 0c06e517e..d5ac64d90 100644
--- a/xs/src/slic3r/GUI/FirmwareDialog.cpp
+++ b/xs/src/slic3r/GUI/FirmwareDialog.cpp
@@ -708,7 +708,8 @@ FirmwareDialog::FirmwareDialog(wxWindow *parent) :
 	panel->SetSizer(vsizer);
 
 	auto *label_hex_picker = new wxStaticText(panel, wxID_ANY, _(L("Firmware image:")));
-	p->hex_picker = new wxFilePickerCtrl(panel, wxID_ANY);
+	p->hex_picker = new wxFilePickerCtrl(panel, wxID_ANY, wxEmptyString, wxFileSelectorPromptStr, 
+		"Hex files (*.hex)|*.hex|All files|*.*");
 
 	auto *label_port_picker = new wxStaticText(panel, wxID_ANY, _(L("Serial port:")));
 	p->port_picker = new wxComboBox(panel, wxID_ANY);