diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index fec5ce40..04b79888 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -8,6 +8,14 @@ function connection() {
 	return $connection;
 }
 
+/** Get Adminer object
+* @return Adminer
+*/
+function adminer() {
+	global $adminer;
+	return $adminer;
+}
+
 /** Unescape database identifier
 * @param string text inside ``
 * @return string
diff --git a/plugins/sql-log.php b/plugins/sql-log.php
index 6310a73f..c61e482a 100644
--- a/plugins/sql-log.php
+++ b/plugins/sql-log.php
@@ -10,13 +10,17 @@ class AdminerSqlLog {
 	var $filename;
 	
 	/**
-	* @param string
+	* @param string defaults to "$database.sql"
 	*/
-	function AdminerSqlLog($filename = "adminer.sql") {
+	function AdminerSqlLog($filename = "") {
 		$this->filename = $filename;
 	}
 	
 	function messageQuery($query) {
+		if ($this->filename == "") {
+			$adminer = adminer();
+			$this->filename = $adminer->database() . ".sql"; // no database goes to ".sql" to avoid collisions
+		}
 		$fp = fopen($this->filename, "a");
 		flock($fp, LOCK_EX);
 		fwrite($fp, $query);