diff --git a/etc/emqx.conf b/etc/emqx.conf
index dcae95e3b..4ad11388a 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -371,8 +371,8 @@ log.file = emqx.log
 ## Limits the total number of characters printed for each log event.
 ##
 ## Value: Integer
-## Default: 8192
-log.chars_limit = 8192
+## Default: No Limit
+#log.chars_limit = 8192
 
 ## Maximum size of each log file.
 ##
diff --git a/priv/emqx.schema b/priv/emqx.schema
index 1d8e60a8f..561d1e770 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -421,7 +421,7 @@ end}.
 ]}.
 
 {mapping, "log.chars_limit", "kernel.logger", [
-  {default, 8192},
+  {default, -1},
   {datatype, integer}
 ]}.