diff --git a/server/SHServ/Controllers/DevicesRESTAPIController.php b/server/SHServ/Controllers/DevicesRESTAPIController.php
index 5dec3ee..0b86c60 100644
--- a/server/SHServ/Controllers/DevicesRESTAPIController.php
+++ b/server/SHServ/Controllers/DevicesRESTAPIController.php
@@ -9,7 +9,8 @@
 
 class DevicesRESTAPIController extends \SHServ\Middleware\Controller {
 	protected function withScanLock(callable $callback) {
-		$lockFile = dirname(__DIR__, 2) . '/Cache/scan.lock';
+		$tmpDir   = sys_get_temp_dir();
+		$lockFile = $tmpDir . '/shserv-scan.lock';
 		$debugLog = dirname(__DIR__, 2) . '/Cache/scan-debug.log';
 
 		$log = function($msg) use ($debugLog) {