diff --git a/common/debug.php b/common/debug.php
index 4c8f0db89..0e56fac0b 100644
--- a/common/debug.php
+++ b/common/debug.php
@@ -109,6 +109,25 @@ if(!defined('__LOG_SLOW_WIDGET__'))
 	define('__LOG_SLOW_WIDGET__', 0);
 }
 
+/**
+ * output comments of the slowlog files
+ *
+ * 0: No limit (not recommended)
+ * 1: Allow only specified IP addresses
+ */
+if(!defined('__LOG_SLOW_PROTECT__'))
+{
+	define('__LOG_SLOW_PROTECT__', 1);
+}
+
+/**
+ * Set a ip address to allow slowlog
+ */
+if(!defined('__LOG_SLOW_PROTECT_IP__'))
+{
+	define('__LOG_SLOW_PROTECT_IP__', '127.0.0.1');
+}
+
 /**
  * Leave DB query information
  *
diff --git a/common/legacy.php b/common/legacy.php
index b2739bf07..82ddabc8b 100644
--- a/common/legacy.php
+++ b/common/legacy.php
@@ -822,6 +822,7 @@ function debugPrint($debug_output = NULL, $display_option = TRUE, $file = '_debu
 function writeSlowlog($type, $elapsed_time, $obj)
 {
 	if(!__LOG_SLOW_TRIGGER__ && !__LOG_SLOW_ADDON__ && !__LOG_SLOW_WIDGET__ && !__LOG_SLOW_QUERY__) return;
+	if(__LOG_SLOW_PROTECT__ === 1 &&  __LOG_SLOW_PROTECT_IP__ != $_SERVER['REMOTE_ADDR']) return;
 
 	static $log_filename = array(
 		'query' => 'files/_slowlog_query.php',