diff --git a/2001/anonymous/Makefile b/2001/anonymous/Makefile
index b22f85dba..ac0ab22e0 100644
--- a/2001/anonymous/Makefile
+++ b/2001/anonymous/Makefile
@@ -71,7 +71,7 @@ CINCLUDE=
 
 # Optimization
 #
-OPT=
+OPT= -O3
 
 # Default flags for ANSI C compilation
 #