diff --git a/include/functions.inc.php b/include/functions.inc.php
index cb9f7929..b4392660 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -1240,20 +1240,6 @@ function serendipity_request_url($uri, $method = 'GET', $contenttype = null, $da
     return $fContent;
 }
 
-
-if (!function_exists('microtime_float')) {
-    /**
-     * Get current timestamp as microseconds
-     *
-     * @access public
-     * @return float    the time
-     */
-    function microtime_float() {
-        list($usec, $sec) = explode(" ", microtime());
-        return ((float)$usec + (float)$sec);
-    }
-}
-
 /**
  * Converts Array data to be used as a GET string
  *
diff --git a/include/functions_images.inc.php b/include/functions_images.inc.php
index 06073fcc..b9a9fd56 100644
--- a/include/functions_images.inc.php
+++ b/include/functions_images.inc.php
@@ -1578,7 +1578,7 @@ function serendipity_displayImageList($page = 0, $lineBreak = NULL, $manage = fa
         if ($debug) echo "<p>Got files: <pre>" . print_r($aFilesOnDisk, true) . "</pre></p>";
         $serendipity['current_image_hash'] = md5(serialize($aFilesOnDisk));
 
-        $nTimeStart = microtime_float();
+        $nTimeStart = microtime(true);
         // MTG 21/01/06: request all images from the database, delete any which don't exist
         // on the filesystem, and mark off files from the file list which are already
         // in the database
@@ -1689,7 +1689,7 @@ function serendipity_displayImageList($page = 0, $lineBreak = NULL, $manage = fa
         }
 
          /*
-         $nTimeEnd = microtime_float ( );
+         $nTimeEnd = microtime(true);
          $nDifference = $nTimeEnd - $nTimeStart;
          echo "<p> total time taken was " . $nDifference . "</p>";
         */
diff --git a/lib/Serendipity/Database/SqlRelayDatabase.php b/lib/Serendipity/Database/SqlRelayDatabase.php
index 31c55fb4..05e3d6c9 100644
--- a/lib/Serendipity/Database/SqlRelayDatabase.php
+++ b/lib/Serendipity/Database/SqlRelayDatabase.php
@@ -140,7 +140,7 @@ class SqlRelayDatabase extends DbAbstract
         $this->db_cursor = $cur;
 
         if ($benchmark) {
-            $start = microtime_float();
+            $start = microtime(true);
         }
 
         if ($expectError) {
@@ -150,7 +150,7 @@ class SqlRelayDatabase extends DbAbstract
         }
 
         if ($benchmark) {
-            $end = microtime_float();
+            $end = microtime(true);
 
             $cur = sqlrcur_alloc($this->db_conn);
             $sql_b = "INSERT INTO BLOGLOG (request, timestamp, sql, exec_time, ip) VALUES ('" . $this->escapeString($_SERVER['REQUEST_URI']) . "', NOW(), '" . $this->escapeString($sql) . "', '" . (number_format($end-$start, 10)) . "', '" . $this->escapeString($_SERVER['REMOTE_ADDR']) . "')";