diff --git a/Quake/in_sdl.c b/Quake/in_sdl.c
index caa7e4d..48fb4d1 100644
--- a/Quake/in_sdl.c
+++ b/Quake/in_sdl.c
@@ -133,6 +133,30 @@ static void IN_EndIgnoringMouseEvents(void)
 #endif
 }
 
+static SDL_EventFilter prevFilter = NULL;
+
+static void IN_BeginIgnoringMouseEvents2(void)
+{
+#if defined(USE_SDL2)
+	void *userdata = NULL;
+	SDL_GetEventFilter(&prevFilter, &userdata);
+	SDL_SetEventFilter(IN_SDL2_FilterMouseEvents, NULL);
+	(void) userdata;
+#else
+	prevFilter = SDL_GetEventFilter();
+	SDL_SetEventFilter(IN_FilterMouseEvents);
+#endif
+}
+
+static void IN_RestoreMouseEvents(void)
+{
+#if defined(USE_SDL2)
+	SDL_SetEventFilter(prevFilter, NULL);
+#else
+	SDL_SetEventFilter(prevFilter);
+#endif
+}
+
 #ifdef MACOS_X_ACCELERATION_HACK
 static cvar_t in_disablemacosxmouseaccel = {"in_disablemacosxmouseaccel", "1", CVAR_ARCHIVE};
 static double originalMouseSpeed = -1.0;
@@ -1014,17 +1038,30 @@ void IN_SendKeyEvents (void)
 #if defined(USE_SDL2)
 		case SDL_WINDOWEVENT:
 			if (event.window.event == SDL_WINDOWEVENT_FOCUS_GAINED)
+			{
+				IN_RestoreMouseEvents();
 				S_UnblockSound();
+			}
 			else if (event.window.event == SDL_WINDOWEVENT_FOCUS_LOST)
+			{
+				IN_BeginIgnoringMouseEvents2();
 				S_BlockSound();
+			}
 			break;
 #else
 		case SDL_ACTIVEEVENT:
 			if (event.active.state & (SDL_APPINPUTFOCUS|SDL_APPACTIVE))
 			{
 				if (event.active.gain)
+				{
+					IN_RestoreMouseEvents();
 					S_UnblockSound();
-				else	S_BlockSound();
+				}
+				else
+				{
+					IN_BeginIgnoringMouseEvents2();
+					S_BlockSound();
+				}
 			}
 			break;
 #endif