diff --git a/Source/Core/DolphinWX/Input/MicButtonConfigDiag.cpp b/Source/Core/DolphinWX/Input/MicButtonConfigDiag.cpp
old mode 100644
new mode 100755
index f42571bfe5..7c9fe07f42
--- a/Source/Core/DolphinWX/Input/MicButtonConfigDiag.cpp
+++ b/Source/Core/DolphinWX/Input/MicButtonConfigDiag.cpp
@@ -12,25 +12,33 @@ MicButtonConfigDialog::MicButtonConfigDialog(wxWindow* const parent, InputConfig
     : InputConfigDialog(parent, config, name, port_num)
 {
   const int space5 = FromDIP(5);
+  const int space150 = FromDIP(150);
 
   auto* const device_chooser = CreateDeviceChooserGroupBox();
 
+  auto* const device_chooser_szr = new wxBoxSizer(wxHORIZONTAL);
+  device_chooser_szr->AddSpacer(space5);
+  device_chooser_szr->Add(device_chooser, 1, wxEXPAND);
+  device_chooser_szr->AddSpacer(space5);
+
   auto* const group_box_button =
       new ControlGroupBox(Pad::GetGroup(port_num, PadGroup::Mic), this, this);
 
   auto* const controls_sizer = new wxBoxSizer(wxHORIZONTAL);
   controls_sizer->Add(group_box_button, 0, wxEXPAND);
+  // Avoid having the device combo box to be too small.
+  controls_sizer->AddSpacer(space150);
 
   auto* const szr_main = new wxBoxSizer(wxVERTICAL);
   szr_main->AddSpacer(space5);
-  szr_main->Add(device_chooser, 0, wxEXPAND);
+  szr_main->Add(device_chooser_szr, 0, wxEXPAND);
   szr_main->AddSpacer(space5);
   szr_main->Add(controls_sizer, 1, wxEXPAND | wxLEFT | wxRIGHT, space5);
   szr_main->AddSpacer(space5);
   szr_main->Add(CreateButtonSizer(wxCLOSE | wxNO_DEFAULT), 0, wxEXPAND | wxLEFT | wxRIGHT, space5);
   szr_main->AddSpacer(space5);
 
-  SetSizer(szr_main);
+  SetSizerAndFit(szr_main);
   Center();
   UpdateGUI();
 }