diff --git a/src/Writer/Ini.php b/src/Writer/Ini.php
index c8a16c7..1fffa8f 100644
--- a/src/Writer/Ini.php
+++ b/src/Writer/Ini.php
@@ -143,7 +143,7 @@ protected function addBranch(array $config, $parents = array())
      */
     protected function prepareValue($value)
     {
-        if (is_integer($value) || is_float($value)) {
+        if (is_int($value) || is_float($value)) {
             return $value;
         } elseif (is_bool($value)) {
             return ($value ? 'true' : 'false');