diff --git a/make.php b/make.php
index 1035895..67e024c 100644
--- a/make.php
+++ b/make.php
@@ -685,7 +685,7 @@ function resolveDependencies($autoupdate=true) {
 
         $this->ensureComposer();
 
-        $php = defined('PHP_BINARY') ? PHP_BINARY : 'php';
+        $php = defined("'PHP_BINARY'") ? PHP_BINARY : 'php';
         if (file_exists(dirname(__file__)."/composer.lock")) {
             if ($autoupdate)
                 passthru($php." ".dirname(__file__)."/composer.phar -v update");