diff --git a/src/Symfony/Component/Process/ProcessPipes.php b/src/Symfony/Component/Process/ProcessPipes.php
index f35d1c1287..850741e6a8 100644
--- a/src/Symfony/Component/Process/ProcessPipes.php
+++ b/src/Symfony/Component/Process/ProcessPipes.php
@@ -313,11 +313,11 @@ class ProcessPipes
             $type = array_search($pipe, $this->pipes);
 
             $data = '';
-            while ($dataread = fread($pipe, self::CHUNK_SIZE)) {
+            while ('' !== $dataread = (string) fread($pipe, self::CHUNK_SIZE)) {
                 $data .= $dataread;
             }
 
-            if ($data) {
+            if ('' !== $data) {
                 $read[$type] = $data;
             }
 
diff --git a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
index 91b8aca20d..fb34351169 100644
--- a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
@@ -287,6 +287,19 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
         }
     }
 
+    public function testZeroAsOutput()
+    {
+        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
+            // see http://stackoverflow.com/questions/7105433/windows-batch-echo-without-new-line
+            $p = $this->getProcess('echo | set /p dummyName=0');
+        } else {
+            $p = $this->getProcess('printf 0');
+        }
+
+        $p->run();
+        $this->assertSame('0', $p->getOutput());
+    }
+
     public function testExitCodeCommandFailed()
     {
         if (defined('PHP_WINDOWS_VERSION_BUILD')) {