diff --git a/src/src/EDITME b/src/src/EDITME
index 085eba4354..ccb6dd5b27 100644
--- a/src/src/EDITME
+++ b/src/src/EDITME
@@ -604,7 +604,7 @@ LDFLAGS += -lopendmarc
 
 # Uncomment the following line to add ARC (Authenticated Received Chain)
 # support.  You must have SPF and DKIM support enabled also.
-# EXPERIMENTAL_ARC=yes
+EXPERIMENTAL_ARC=yes
 
 # Uncomment the following lines to add Brightmail AntiSpam support. You need
 # to have the Brightmail client SDK installed. Please check the experimental