diff --git a/dbjson.php b/dbjson.php
index c03884b..05a5f22 100644
--- a/dbjson.php
+++ b/dbjson.php
@@ -73,7 +73,7 @@ class dbjson
     $this->db[$collection]["content"][$uniqueKey] = array_merge (
                                                     array ("_id"=>$uniqueKey),
                                                     $document);
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->lockUN ();
     return 1;
   }
@@ -97,7 +97,7 @@ class dbjson
                                                       array ("_id"=>$uniqueKey),
                                                       $document);
     }
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->db = null;
     $this->lockUN ();
     return count ($documents);
@@ -197,7 +197,7 @@ class dbjson
                               $this->db[$collection]["content"][$key]))
           unset ($this->db[$collection]["content"][$key][$field]);
     }
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->lockUN ();
     $this->db = null;
     return count ($keys);
@@ -223,7 +223,7 @@ class dbjson
       $replace = array_merge ($replace, $document);
       $this->db[$collection]["content"][$key] = $replace;
     }
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->lockUN ();
     $this->db = null;
     return count ($keys);
@@ -245,7 +245,7 @@ class dbjson
     reset ($keys);
     $key = key ($keys);
     unset ($this->db[$collection]["content"][$key]);
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->lockUN ();
     $this->db = null;
     return 1;
@@ -265,7 +265,7 @@ class dbjson
     $keys = $this->filter ($collection, $filter);
     foreach ($keys as $key)
       unset ($this->db[$collection]["content"][$key]);
-    $this->writeDB  ($this->db);
+    $this->writeDB ();
     $this->lockUN ();
     $this->db = null;
     return count ($keys);
@@ -417,8 +417,8 @@ class dbjson
     * @param $data array The database to store
     * @return bool True if the recording is OK, false if there is a problem
     */
-  private function writeDB ($data)
+  private function writeDB ()
   {
-    return !! file_put_contents ($this->dbfile, json_encode ($data));
+    return !! file_put_contents ($this->dbfile, json_encode ($this->db));
   }
 }