diff --git a/src/frontend/qt_sdl/EmuInstance.cpp b/src/frontend/qt_sdl/EmuInstance.cpp
index 62481ac7..27d804ac 100644
--- a/src/frontend/qt_sdl/EmuInstance.cpp
+++ b/src/frontend/qt_sdl/EmuInstance.cpp
@@ -187,16 +187,16 @@ void EmuInstance::deleteWindow(int id, bool close)
 
     emuThread->detachWindow(win);
 
-    if (close)
-        win->close();
-
     windowList[id] = nullptr;
     numWindows--;
 
     if (topWindow == win) topWindow = nullptr;
     if (mainWindow == win) mainWindow = nullptr;
 
-    if ((!mainWindow) && !deleting)
+    if (close)
+        win->close();
+
+    if ((!mainWindow) && (!deleting))
     {
         // if we closed this instance's main window, delete the instance
         deleteEmuInstance(instanceID);
diff --git a/src/frontend/qt_sdl/LAN.cpp b/src/frontend/qt_sdl/LAN.cpp
index 322ce05d..9b4e5bbd 100644
--- a/src/frontend/qt_sdl/LAN.cpp
+++ b/src/frontend/qt_sdl/LAN.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2022 melonDS team
+    Copyright 2016-2024 melonDS team
 
     This file is part of melonDS.
 
diff --git a/src/frontend/qt_sdl/LAN.h b/src/frontend/qt_sdl/LAN.h
index 347980ac..5a732fed 100644
--- a/src/frontend/qt_sdl/LAN.h
+++ b/src/frontend/qt_sdl/LAN.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2022 melonDS team
+    Copyright 2016-2024 melonDS team
 
     This file is part of melonDS.
 
diff --git a/src/frontend/qt_sdl/Netplay.cpp b/src/frontend/qt_sdl/Netplay.cpp
index 1e1a3a36..b1bdea84 100644
--- a/src/frontend/qt_sdl/Netplay.cpp
+++ b/src/frontend/qt_sdl/Netplay.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2022 melonDS team
+    Copyright 2016-2024 melonDS team
 
     This file is part of melonDS.
 
diff --git a/src/frontend/qt_sdl/Netplay.h b/src/frontend/qt_sdl/Netplay.h
index b869fefc..1eff54b0 100644
--- a/src/frontend/qt_sdl/Netplay.h
+++ b/src/frontend/qt_sdl/Netplay.h
@@ -1,5 +1,5 @@
 /*
-    Copyright 2016-2022 melonDS team
+    Copyright 2016-2024 melonDS team
 
     This file is part of melonDS.
 
diff --git a/src/net/CMakeLists.txt b/src/net/CMakeLists.txt
index 082c00fb..0b0be117 100644
--- a/src/net/CMakeLists.txt
+++ b/src/net/CMakeLists.txt
@@ -4,6 +4,7 @@ add_library(net-utils STATIC
     Net_Slirp.cpp
     PacketDispatcher.cpp
     LocalMP.cpp
+        MPInterface.h
 )
 
 target_include_directories(net-utils PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
diff --git a/src/net/MPInterface.h b/src/net/MPInterface.h
new file mode 100644
index 00000000..e86736e6
--- /dev/null
+++ b/src/net/MPInterface.h
@@ -0,0 +1,50 @@
+/*
+    Copyright 2016-2024 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef MPINTERFACE_H
+#define MPINTERFACE_H
+
+#include "types.h"
+
+namespace melonDS
+{
+
+class MPInterface
+{
+public:
+    [[nodiscard]] int GetRecvTimeout() const noexcept { return RecvTimeout; }
+    void SetRecvTimeout(int timeout) noexcept { RecvTimeout = timeout; }
+
+    virtual void Begin(int inst) = 0;
+    virtual void End(int inst) = 0;
+
+    virtual int SendPacket(int inst, u8* data, int len, u64 timestamp) = 0;
+    virtual int RecvPacket(int inst, u8* data, u64* timestamp) = 0;
+    virtual int SendCmd(int inst, u8* data, int len, u64 timestamp) = 0;
+    virtual int SendReply(int inst, u8* data, int len, u64 timestamp, u16 aid) = 0;
+    virtual int SendAck(int inst, u8* data, int len, u64 timestamp) = 0;
+    virtual int RecvHostPacket(int inst, u8* data, u64* timestamp) = 0;
+    virtual u16 RecvReplies(int inst, u8* data, u64 timestamp, u16 aidmask) = 0;
+
+protected:
+    int RecvTimeout = 25;
+};
+
+}
+
+#endif // MPINTERFACE_H