diff --git a/src/osd/libretro/libretro-internal/libretro.cpp b/src/osd/libretro/libretro-internal/libretro.cpp
index c392c54f741d3..5e074b1d4d8fa 100755
--- a/src/osd/libretro/libretro-internal/libretro.cpp
+++ b/src/osd/libretro/libretro-internal/libretro.cpp
@@ -50,6 +50,7 @@ static char option_joystick_deadzone[50];
 static char option_joystick_saturation[50];
 static char option_mame_4way[50];
 static char option_rotation_mode[50];
+static char option_thread_mode[50];
 static char option_renderer[50];
 static char option_res[50];
 static char option_overclock[50];
@@ -199,6 +200,7 @@ void retro_set_environment(retro_environment_t cb)
    sprintf(option_joystick_saturation, "%s_%s", core, "joystick_saturation");
    sprintf(option_mame_4way, "%s_%s", core, "mame_4way_enable");
    sprintf(option_rotation_mode, "%s_%s", core, "rotation_mode");
+   sprintf(option_thread_mode, "%s_%s", core, "thread_mode");
    sprintf(option_renderer, "%s_%s", core, "alternate_renderer");
    sprintf(option_res, "%s_%s", core, "altres");
    sprintf(option_overclock, "%s_%s", core, "cpu_overclock");
@@ -226,6 +228,7 @@ void retro_set_environment(retro_environment_t cb)
       { option_joystick_saturation, "Joystick Saturation; 1.00|0.05|0.10|0.15|0.20|0.25|0.30|0.35|0.40|0.45|0.50|0.55|0.60|0.65|0.70|0.75|0.80|0.85|0.90|0.95|1.00" },
       { option_mame_4way, "Joystick 4-way Simulation; disabled|4way|strict|qbert"},
       { option_rotation_mode, "Rotation Mode; libretro|internal|none" },
+      { option_thread_mode, "Enable Threads(restart); enabled|disabled" },
       { option_renderer, "Alternate Renderer; disabled|enabled" },
       { option_res, "Alternate Renderer Resolution; 640x480|640x360|800x600|800x450|960x720|960x540|1024x768|1024x576|1280x960|1280x720|1600x1200|1600x900|1440x1080|1920x1080|1920x1440|2560x1440|2880x2160|3840x2160" },
       { option_overclock, "Main CPU Overclock; default|30|31|32|33|34|35|36|37|38|39|40|41|42|43|44|45|46|47|48|49|50|51|52|53|54|55|60|65|70|75|80|85|90|95|100|105|110|115|120|125|130|135|140|145|150" },
@@ -397,6 +400,19 @@ static void check_variables(void)
          rotation_mode = 0;
    }
 
+   var.key   = option_thread_mode;
+   var.value = NULL;
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
+   {
+      if (!strcmp(var.value, "enabled"))
+         thread_mode = 1;
+      else if (!strcmp(var.value, "disabled"))
+         thread_mode = 0;
+      else
+         thread_mode = 0;
+   }
+ 
    var.key   = option_renderer;
    var.value = NULL;
 
diff --git a/src/osd/libretro/libretro-internal/libretro_shared.h b/src/osd/libretro/libretro-internal/libretro_shared.h
index b41fbfb057019..1190d811c5209 100644
--- a/src/osd/libretro/libretro-internal/libretro_shared.h
+++ b/src/osd/libretro/libretro-internal/libretro_shared.h
@@ -106,6 +106,7 @@ extern float retro_aspect;
 extern float retro_fps;
 extern float view_aspect;
 extern int rotation_mode;
+extern int thread_mode;
 static const char core[] = "mame";
 
 /* libretro callbacks */
diff --git a/src/osd/libretro/libretro-internal/retro_init.cpp b/src/osd/libretro/libretro-internal/retro_init.cpp
index fd308889e0f0e..587580d848b72 100755
--- a/src/osd/libretro/libretro-internal/retro_init.cpp
+++ b/src/osd/libretro/libretro-internal/retro_init.cpp
@@ -71,7 +71,7 @@ static bool arcade = false;
 static int FirstTimeUpdate = 1;
 int rotation_mode = 0;
 int rotation_allow = 0;
-
+int thread_mode = 0;
 // rom file name and path
 char g_rom_dir[1024];
 char mediaType[10];
diff --git a/src/osd/osdsync.cpp b/src/osd/osdsync.cpp
index 464a1892ed92e..1e68333e88b54 100644
--- a/src/osd/osdsync.cpp
+++ b/src/osd/osdsync.cpp
@@ -61,6 +61,9 @@
 #define end_timing(v)           do { } while (0)
 #endif
 
+#if defined(__LIBRETRO__)
+extern int thread_mode;
+#endif
 template<typename _AtomType, typename _MainType>
 static void spin_while(const volatile _AtomType * volatile atom, const _MainType val, const osd_ticks_t timeout, const int invert = 0)
 {
@@ -88,6 +91,12 @@ static void spin_while_not(const volatile _AtomType * volatile atom, const _Main
 
 int osd_get_num_processors(bool heavy_mt)
 {
+
+#if defined(__LIBRETRO__)
+	if(!thread_mode)
+	return 1;
+#endif 
+
 #if defined(SDLMAME_EMSCRIPTEN)
 	// multithreading is not supported at this time
 	return 1;
@@ -280,6 +289,11 @@ osd_work_queue *osd_work_queue_alloc(int flags)
 	threadnum = 0;
 #endif
 
+#if defined(__LIBRETRO__)	
+	if(!thread_mode)
+		threadnum = 0;
+#endif
+
 	// clamp to the maximum
 	queue->threads = std::min(threadnum, WORK_MAX_THREADS);