diff --git a/usr/local/www/system_firmware.php b/usr/local/www/system_firmware.php
index 3eddb47588..f340b8f7e5 100755
--- a/usr/local/www/system_firmware.php
+++ b/usr/local/www/system_firmware.php
@@ -51,7 +51,7 @@ ini_set('max_input_time', '3600');
 
 function file_is_for_platform($filename) {
 	global $g;
-	exec("tar xzf $fiename -C /tmp/ etc/platform");
+	exec("tar xzf $filename -C /tmp/ etc/platform");
 	if(!file_exists("/tmp/etc/platform")) 
 		return false;
 	$upgrade_is_for_platform = trim(file_get_contents("/tmp/etc/platform"));