diff --git a/lib/private/Files/Cache/Propagator.php b/lib/private/Files/Cache/Propagator.php
index 3b647a5ac63..dafdc6e12cd 100644
--- a/lib/private/Files/Cache/Propagator.php
+++ b/lib/private/Files/Cache/Propagator.php
@@ -62,6 +62,10 @@ class Propagator implements IPropagator {
 			}
 		}
 
+		if ($parents === []) {
+			return;
+		}
+
 		if ($this->inBatch) {
 			foreach ($parents as $parent) {
 				$this->addToBatch($parent, $time, $sizeDifference);