diff --git a/Common/KeyMap.cpp b/Common/KeyMap.cpp
index 81bcc54b31..b3bc09c164 100644
--- a/Common/KeyMap.cpp
+++ b/Common/KeyMap.cpp
@@ -282,4 +282,17 @@ static int KeyMap::SetKeyMapping(KeyMap::Key key, int btn)
 	g_Config.iMappingMap[key] = btn;
 }
 
-// TODO: implement RegisterPlatformDefaultKeyMap()
+static int KeyMap::RegisterPlatformDefaultKeyMap(std::map<int,int> *overriding_map)
+{
+	if (overriding_map == NULL)
+		return 1;
+	platform_keymap = overriding_map;
+	return 0;
+}
+
+static void KeyMap::DeregisterPlatformDefaultKeyMap(void)
+{
+	platform_keymap = NULL;
+	return;
+}
+
diff --git a/Common/KeyMap.h b/Common/KeyMap.h
index 76d0f3c0b5..2d10d140de 100644
--- a/Common/KeyMap.h
+++ b/Common/KeyMap.h
@@ -185,5 +185,6 @@ namespace KeyMap {
 		 * Any buttons missing will
 		 * fallback to KeyMap's keymap. */
 		static int RegisterPlatformDefaultKeyMap(std::map<int,int> *);
+		static void DeregisterPlatformDefaultKeyMap(void);
 }