diff --git a/compileTimeOptions.h b/compileTimeOptions.h
index 1f6ff8f5732fe3779fd5eff0db9f6b51b7f9a485..b7669fcc1faa1bf557717232cc111ea57ebbffff 100644
--- a/compileTimeOptions.h
+++ b/compileTimeOptions.h
@@ -3,7 +3,7 @@
 
 // bool; use vector<bool> instead of vector<size_t> for classes
 #ifndef SAVE_MEMORY
-#define SAVE_MEMORY 0 
+#define SAVE_MEMORY 1
 #endif