diff --git a/src/xrEngine/device.cpp b/src/xrEngine/device.cpp
index 1f7622df24e..63f2c218874 100644
--- a/src/xrEngine/device.cpp
+++ b/src/xrEngine/device.cpp
@@ -68,7 +68,33 @@ bool CRenderDevice::RenderBegin()
 }
 
 void CRenderDevice::Clear() { GEnv.Render->Clear(); }
-extern void CheckPrivilegySlowdown();
+
+namespace
+{
+void CheckPrivilegySlowdown()
+{
+#ifndef MASTER_GOLD
+    const auto slowdownthread = +[](void*)
+    {
+        for (;;)
+        {
+            if (Device.GetStats().fFPS < 30)
+                Sleep(1);
+            if (Device.mt_bMustExit || !pSettings || !Console || !pInput)
+                return;
+        }
+    };
+
+    if (strstr(Core.Params, "-slowdown"))
+        Threading::SpawnThread(slowdownthread, "slowdown", 0, nullptr);
+    if (strstr(Core.Params, "-slowdown2x"))
+    {
+        Threading::SpawnThread(slowdownthread, "slowdown", 0, nullptr);
+        Threading::SpawnThread(slowdownthread, "slowdown", 0, nullptr);
+    }
+#endif
+}
+}
 
 void CRenderDevice::RenderEnd(void)
 {
diff --git a/src/xrEngine/main.cpp b/src/xrEngine/main.cpp
index ba7712b008d..9ead4c77a0c 100644
--- a/src/xrEngine/main.cpp
+++ b/src/xrEngine/main.cpp
@@ -195,29 +195,6 @@ void execUserScript()
     Console->ExecuteScript(Console->ConfigFile);
 }
 
-void slowdownthread(void*)
-{
-    for (;;)
-    {
-        if (Device.GetStats().fFPS < 30)
-            Sleep(1);
-        if (Device.mt_bMustExit || !pSettings || !Console || !pInput)
-            return;
-    }
-}
-void CheckPrivilegySlowdown()
-{
-#ifdef DEBUG
-    if (strstr(Core.Params, "-slowdown"))
-        Threading::SpawnThread(slowdownthread, "slowdown", 0, 0);
-    if (strstr(Core.Params, "-slowdown2x"))
-    {
-        Threading::SpawnThread(slowdownthread, "slowdown", 0, 0);
-        Threading::SpawnThread(slowdownthread, "slowdown", 0, 0);
-    }
-#endif
-}
-
 ENGINE_API void Startup()
 {
     InitSoundDeviceList();