diff --git a/library/ZFDebug/Controller/Plugin/Debug/Plugin/Log.php b/library/ZFDebug/Controller/Plugin/Debug/Plugin/Log.php
index 3d71536..7dedaad 100644
--- a/library/ZFDebug/Controller/Plugin/Debug/Plugin/Log.php
+++ b/library/ZFDebug/Controller/Plugin/Debug/Plugin/Log.php
@@ -117,9 +117,9 @@ public function getIconData()
      */
     public function mark($name, $logFirst = false) {
         if (isset($this->_marks[$name])) {
-            $this->_marks[$name]['time'] = round((microtime(true)-$_SERVER['REQUEST_TIME_FLOAT'])*1000-$this->_marks[$name]['time']).'ms';
+            $this->_marks[$name]['time'] = round((microtime(true)-$_SERVER['REQUEST_TIME_FLOAT'])*1000-(int)$this->_marks[$name]['time']).'ms';
             if (function_exists('memory_get_usage')) {
-                $this->_marks[$name]['memory'] = round((memory_get_usage()-$this->_marks[$name]['memory'])/1024) . 'K';
+                $this->_marks[$name]['memory'] = round((memory_get_usage()-(int)$this->_marks[$name]['memory'])/1024) . 'K';
             } else {
                 $this->_marks[$name]['memory'] = 'N/A';
             }
@@ -218,4 +218,4 @@ public function dispatchLoopShutdown()
     {
         $this->mark('Dispatch');
     }
-}
\ No newline at end of file
+}