diff --git a/lib/private/Preview/Generator.php b/lib/private/Preview/Generator.php
index 3e81004c8aadb..86579e3480bb1 100644
--- a/lib/private/Preview/Generator.php
+++ b/lib/private/Preview/Generator.php
@@ -184,6 +184,10 @@ private function getMaxPreview(ISimpleFolder $previewFolder, File $file, $mimeTy
 					continue;
 				}
 
+				if (!$provider->isAvailable($file)) {
+					continue;
+				}
+
 				$maxWidth = (int)$this->config->getSystemValue('preview_max_x', 4096);
 				$maxHeight = (int)$this->config->getSystemValue('preview_max_y', 4096);