diff --git a/src/Symfony/Component/Console/Helper/ProcessHelper.php b/src/Symfony/Component/Console/Helper/ProcessHelper.php
index 0eaa370321..f03774d35d 100644
--- a/src/Symfony/Component/Console/Helper/ProcessHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProcessHelper.php
@@ -61,7 +61,7 @@ class ProcessHelper extends Helper
             $process = $cmd[0];
             unset($cmd[0]);
         } else {
-            throw new \InvalidArgumentException(sprintf('Invalid command provided to "%s()": the command should an array whose first is element is either the path to the binary to run of a "Process" object.', __METHOD__));
+            throw new \InvalidArgumentException(sprintf('Invalid command provided to "%s()": the command should be an array whose first element is either the path to the binary to run or a "Process" object.', __METHOD__));
         }
 
         if ($verbosity <= $output->getVerbosity()) {