diff --git a/src/ac/ac.default.conf b/src/ac/ac.default.conf
index 793b9e7e..4615a0b6 100644
--- a/src/ac/ac.default.conf
+++ b/src/ac/ac.default.conf
@@ -116,6 +116,12 @@
 # Defalut: 
 # listen =
 
+# use_loopback
+# Include loopback interfaces if listen addresses are auto detected
+#
+# Default:
+# use_loopback = false
+
 
 # ---------------------------------------------------
 # SSL related stuff