diff --git a/src/Pattern/SnapshotBlocklistMatcher.php b/src/Pattern/SnapshotBlocklistMatcher.php
index 2cfd459..ecf384b 100644
--- a/src/Pattern/SnapshotBlocklistMatcher.php
+++ b/src/Pattern/SnapshotBlocklistMatcher.php
@@ -59,7 +59,7 @@ public function withBackend(PatternBackendInterface $patternBackend): self
         }
 
         $rebound = new self($patternBackend, $this->ipExtractor, $this->backendName);
-        $rebound->failOpen = $this->failOpen;
+        $rebound->useFailOpen($this->failOpen);
         return $rebound;
     }