diff --git a/src/config.h b/src/config.h
index ac6907e0e357c8f357c7abf538d5e16f2790c186..67e02e1e9efb5c48e5542011c3628ef090bb9277 100644
--- a/src/config.h
+++ b/src/config.h
@@ -8,7 +8,7 @@
  * with DEBUG defined debugging becomes much easier.
  */
 
-#undef DEBUG
+#define DEBUG
 
 /*
  * Define the evaluator stack size, used for just about everything.