diff --git a/htdocs/install/etape2.php b/htdocs/install/etape2.php
index 92b5f2111b7..a9d5b3ea85a 100644
--- a/htdocs/install/etape2.php
+++ b/htdocs/install/etape2.php
@@ -35,7 +35,7 @@ $ok = 0;
 $err=error_reporting();
 error_reporting(0);		// Disable all errors
 //error_reporting(E_ALL);
-@set_time_limit(300);	// Need more than 240 on Windows 7/64
+@set_time_limit(900);	// Need 900 on some OS like Windows 7/64
 error_reporting($err);
 
 $action=GETPOST('action');