diff --git a/src/render_d3d9.c b/src/render_d3d9.c
index 6bdf8b8..b7bedaa 100644
--- a/src/render_d3d9.c
+++ b/src/render_d3d9.c
@@ -436,5 +436,9 @@ DWORD WINAPI d3d9_render_main(void)
         
         fpsl_frame_end();
     }
+
+    if (g_ddraw->vhack)
+        InterlockedExchange(&g_ddraw->upscale_hack_active, FALSE);
+
     return 0;
 }
diff --git a/src/render_ogl.c b/src/render_ogl.c
index 8c0392d..0252200 100644
--- a/src/render_ogl.c
+++ b/src/render_ogl.c
@@ -789,7 +789,8 @@ static void ogl_render()
         fpsl_frame_end();
     }
 
-    InterlockedExchange(&g_ddraw->upscale_hack_active, FALSE);
+    if (g_ddraw->vhack)
+        InterlockedExchange(&g_ddraw->upscale_hack_active, FALSE);
 }
 
 static void ogl_delete_context(HGLRC context)