diff --git a/apps/files_external/lib/Lib/Storage/SMB.php b/apps/files_external/lib/Lib/Storage/SMB.php
index b8ca4eda933..aa338c397bd 100644
--- a/apps/files_external/lib/Lib/Storage/SMB.php
+++ b/apps/files_external/lib/Lib/Storage/SMB.php
@@ -169,6 +169,8 @@ class SMB extends Common implements INotifyStorage {
 			}
 		} catch (ConnectException $e) {
 			$this->throwUnavailable($e);
+		} catch (InvalidArgumentException $e) {
+			$this->throwUnavailable($e);
 		} catch (NotFoundException $e) {
 			throw new \OCP\Files\NotFoundException($e->getMessage(), 0, $e);
 		} catch (ForbiddenException $e) {