diff --git a/library/Zend/ProgressBar/Adapter/Console.php b/library/Zend/ProgressBar/Adapter/Console.php
index dc62d27dd5..d7eb911841 100644
--- a/library/Zend/ProgressBar/Adapter/Console.php
+++ b/library/Zend/ProgressBar/Adapter/Console.php
@@ -239,9 +239,9 @@ public function setWidth($width = null)
                 $this->_width = 80;
 
                 // Try to determine the width through stty
-                if (preg_match('#\d+ (\d+)#', (string) @shell_exec('stty size'), $match) === 1) {
+                if (preg_match('#\d+ (\d+)#', (string) @shell_exec('stty size 2>/dev/null'), $match) === 1) {
                     $this->_width = (int) $match[1];
-                } else if (preg_match('#columns = (\d+);#', (string) @shell_exec('stty'), $match) === 1) {
+                } else if (preg_match('#columns = (\d+);#', (string) @shell_exec('stty 2>/dev/null'), $match) === 1) {
                     $this->_width = (int) $match[1];
                 }
             }