diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index 9589136c6b096..b0a5916adfcaa 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -1413,8 +1413,8 @@ private function resetProcessData()
         $this->exitcode = null;
         $this->fallbackStatus = array();
         $this->processInformation = null;
-        $this->stdout = fopen('php://temp/maxmemory:'.(1024 * 1024), 'wb+');
-        $this->stderr = fopen('php://temp/maxmemory:'.(1024 * 1024), 'wb+');
+        $this->stdout = fopen('php://temp/maxmemory:'.(1024 * 1024), 'w+b');
+        $this->stderr = fopen('php://temp/maxmemory:'.(1024 * 1024), 'w+b');
         $this->process = null;
         $this->latestSignal = null;
         $this->status = self::STATUS_READY;
diff --git a/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php b/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
index 18caa3657d2f5..36fd5b382cd30 100644
--- a/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
@@ -38,7 +38,7 @@ public function format(MessageCatalogue $messages, $domain = 'messages')
      */
     public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
     {
-        $handle = fopen('php://memory', 'rb+');
+        $handle = fopen('php://memory', 'r+b');
 
         foreach ($messages->all($domain) as $source => $target) {
             fputcsv($handle, array($source, $target), $this->delimiter, $this->enclosure);