diff --git a/src/I18n/Loader/Gettext.php b/src/I18n/Loader/Gettext.php
index 00d5404..44373c3 100644
--- a/src/I18n/Loader/Gettext.php
+++ b/src/I18n/Loader/Gettext.php
@@ -144,7 +144,7 @@ public function load($locale, $filename)
         }
         
         // Read header entries
-        if (array_key_exists('', $textDomain)) {
+        if (property_exists($textDomain, '')) {
             //  We really don't need this for our needs
             //$rawHeaders = explode("\n", trim($textDomain['']));
             //
@@ -194,4 +194,4 @@ protected function readIntegerList($num)
     
         return unpack('N' . $num, fread($this->file, 4 * $num));
     }
-}
\ No newline at end of file
+}