diff --git a/UnleashedRecomp/CMakeLists.txt b/UnleashedRecomp/CMakeLists.txt
index ad2abc6f..752c6cce 100644
--- a/UnleashedRecomp/CMakeLists.txt
+++ b/UnleashedRecomp/CMakeLists.txt
@@ -82,6 +82,7 @@ set(SWA_UI_CXX_SOURCES
 )
 
 set(SWA_CXX_SOURCES
+    "exports.cpp"
     "main.cpp"
     "misc_impl.cpp"
     "stdafx.cpp"
diff --git a/UnleashedRecomp/cfg/config.h b/UnleashedRecomp/cfg/config.h
index 7013c376..9378be2b 100644
--- a/UnleashedRecomp/cfg/config.h
+++ b/UnleashedRecomp/cfg/config.h
@@ -2,6 +2,7 @@
 
 #include "config_detail.h"
 #include "config_locale.h"
+#include "exports.h"
 
 class Config
 {
@@ -41,7 +42,14 @@ public:
         def->Value = std::clamp(def->Value, 0.25f, 2.0f);
     });
 
-    CONFIG_DEFINE_LOCALISED("Video", bool, Fullscreen, false);
+    CONFIG_DEFINE_CALLBACK("Video", bool, Fullscreen, false,
+    {
+        def->NameLocale = &g_Fullscreen_locale;
+        def->DescLocale = &g_Fullscreen_desc_locale;
+
+        Window_SetFullscreen(def->Value);
+    });
+
     CONFIG_DEFINE_LOCALISED("Video", bool, VSync, true);
     CONFIG_DEFINE_LOCALISED("Video", bool, TripleBuffering, true);
     CONFIG_DEFINE_LOCALISED("Video", int32_t, FPS, 60);
diff --git a/UnleashedRecomp/cfg/config_detail.cpp b/UnleashedRecomp/cfg/config_detail.cpp
index b8edf28a..5359b751 100644
--- a/UnleashedRecomp/cfg/config_detail.cpp
+++ b/UnleashedRecomp/cfg/config_detail.cpp
@@ -40,8 +40,8 @@ ConfigDef<T>::ConfigDef(std::string section, std::string name, CONFIG_LOCALE* na
 
 // CONFIG_DEFINE_CALLBACK
 template<typename T>
-ConfigDef<T>::ConfigDef(std::string section, std::string name, T defaultValue, std::function<void(ConfigDef<T>*)> readCallback)
-    : Section(section), Name(name), DefaultValue(defaultValue), ReadCallback(readCallback)
+ConfigDef<T>::ConfigDef(std::string section, std::string name, T defaultValue, std::function<void(ConfigDef<T>*)> callback)
+    : Section(section), Name(name), DefaultValue(defaultValue), Callback(callback)
 {
     Config::Definitions.emplace_back(this);
 }
diff --git a/UnleashedRecomp/cfg/config_detail.h b/UnleashedRecomp/cfg/config_detail.h
index 3853c94a..8b2f8470 100644
--- a/UnleashedRecomp/cfg/config_detail.h
+++ b/UnleashedRecomp/cfg/config_detail.h
@@ -202,7 +202,7 @@ public:
     std::unordered_map<std::string, T>* EnumTemplate;
     std::map<T, std::string> EnumTemplateReverse{};
     CONFIG_ENUM_LOCALE(T)* EnumLocale;
-    std::function<void(ConfigDef<T>*)> ReadCallback;
+    std::function<void(ConfigDef<T>*)> Callback;
 
     // CONFIG_DEFINE
     ConfigDef(std::string section, std::string name, T defaultValue);
@@ -217,7 +217,7 @@ public:
     ConfigDef(std::string section, std::string name, CONFIG_LOCALE* nameLocale, CONFIG_LOCALE* descLocale, T defaultValue, std::unordered_map<std::string, T>* enumTemplate, CONFIG_ENUM_LOCALE(T)* enumLocale);
 
     // CONFIG_DEFINE_CALLBACK
-    ConfigDef(std::string section, std::string name, T defaultValue, std::function<void(ConfigDef<T>*)> readCallback);
+    ConfigDef(std::string section, std::string name, T defaultValue, std::function<void(ConfigDef<T>*)> callback);
 
     void ReadValue(toml::v3::ex::parse_result& toml) override
     {
@@ -240,8 +240,8 @@ public:
                 Value = section[Name].value_or(DefaultValue);
             }
 
-            if (ReadCallback)
-                ReadCallback(this);
+            if (Callback)
+                Callback(this);
         }
     }
 
diff --git a/UnleashedRecomp/exports.cpp b/UnleashedRecomp/exports.cpp
new file mode 100644
index 00000000..65dbae7a
--- /dev/null
+++ b/UnleashedRecomp/exports.cpp
@@ -0,0 +1,6 @@
+#include <ui/window.h>
+
+extern "C" void Window_SetFullscreen(bool isEnabled)
+{
+    Window::SetFullscreen(isEnabled);
+}
diff --git a/UnleashedRecomp/exports.h b/UnleashedRecomp/exports.h
new file mode 100644
index 00000000..a19eea6a
--- /dev/null
+++ b/UnleashedRecomp/exports.h
@@ -0,0 +1,3 @@
+#pragma once
+
+extern "C" void Window_SetFullscreen(bool isEnabled);
diff --git a/UnleashedRecomp/ui/options_menu.cpp b/UnleashedRecomp/ui/options_menu.cpp
index 1f490abd..19734973 100644
--- a/UnleashedRecomp/ui/options_menu.cpp
+++ b/UnleashedRecomp/ui/options_menu.cpp
@@ -405,7 +405,12 @@ static void DrawConfigOption(int32_t rowIndex, float yOffset, ConfigDef<T>* conf
         if constexpr (std::is_same_v<T, bool>)
         {
             if (padState.IsTapped(SWA::eKeyState_A))
+            {
                 config->Value = !config->Value;
+
+                if (config->Callback)
+                    config->Callback(config);
+            }
         }
         else
         {
@@ -586,6 +591,9 @@ static void DrawConfigOption(int32_t rowIndex, float yOffset, ConfigDef<T>* conf
 
             config->Value = std::clamp(config->Value, valueMin, valueMax);
         }
+
+        if (config->Callback)
+            config->Callback(config);
     }
 
     std::string valueText;