diff --git a/Python/compile.c b/Python/compile.c
index 1cf53f9..25665b5 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -32,7 +32,7 @@
 #include "symtable.h"
 #include "opcode.h"
 
-int Py_OptimizeFlag = 0;
+int Py_OptimizeFlag = 1;
 
 #define DEFAULT_BLOCK_SIZE 16
 #define DEFAULT_BLOCKS 8
