diff --git a/Lib/re.py b/Lib/re.py
index 6df46958664..6d75bb9c437 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -20,8 +20,8 @@
 # thanks /F
 #
 
-# engine = "sre"
-engine = "pre"
+engine = "sre"
+# engine = "pre"
 
 if engine == "sre":
     # New unicode-aware engine