diff --git a/src/engine/engine.h b/src/engine/engine.h
index 20034a4f0..2fd9e8b60 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -52,7 +52,7 @@ class DivWorkPool;
 #define EXTERN_BUSY_BEGIN_SOFT e->softLocked=true; e->isBusy.lock();
 #define EXTERN_BUSY_END e->isBusy.unlock(); e->softLocked=false;
 
-//#define DIV_UNSTABLE
+#define DIV_UNSTABLE
 
 #define DIV_VERSION "0.6pre17"
 #define DIV_ENGINE_VERSION 179