diff --git a/lib/Handler/SignEngine/JSignPdfHandler.php b/lib/Handler/SignEngine/JSignPdfHandler.php
index e539abbd8a..c8a0a70e1e 100644
--- a/lib/Handler/SignEngine/JSignPdfHandler.php
+++ b/lib/Handler/SignEngine/JSignPdfHandler.php
@@ -109,7 +109,7 @@ private function getEnvironments(): string {
 	 */
 	private function getHome(): string {
 		$jSignPdfHome = $this->appConfig->getValueString(Application::APP_ID, 'jsignpdf_home', '');
-		if ($jSignPdfHome) {
+		if ($jSignPdfHome && is_dir($jSignPdfHome)) {
 			return $jSignPdfHome;
 		}
 		$jsignpdfTempFolder = $this->tempManager->getTemporaryFolder('jsignpdf');