diff --git a/include/picconf.h b/include/picconf.h
index ef767615..2d9c7837 100644
--- a/include/picconf.h
+++ b/include/picconf.h
@@ -19,10 +19,9 @@
 /* enable all debug flags */
 #define DEBUG 1
 
-#define GC_STRESS 1
-
 #if DEBUG
 # define GC_DEBUG 1
+# define GC_STRESS 1
 # define VM_DEBUG 1
 #endif