diff --git a/bfps/cpp/field.cpp b/bfps/cpp/field.cpp
index 452193c4602d0a47f938f1fe0bacbc69396b64f5..95a44f449c551e4de4b6e4199b8714a74ca80ee5 100644
--- a/bfps/cpp/field.cpp
+++ b/bfps/cpp/field.cpp
@@ -24,7 +24,7 @@
 
 
 
-//#define NDEBUG
+#define NDEBUG
 
 #include <sys/stat.h>
 #include <cmath>