diff --git a/src/Recorders/DumpRecorder/MultiDumpHandler.php b/src/Recorders/DumpRecorder/MultiDumpHandler.php
index 9bf72f0..4ddea17 100644
--- a/src/Recorders/DumpRecorder/MultiDumpHandler.php
+++ b/src/Recorders/DumpRecorder/MultiDumpHandler.php
@@ -16,9 +16,11 @@ public function dump(mixed $value): void
         }
     }
 
-    public function addHandler(callable $callable = null): self
+    public function addHandler(?callable $callable = null): self
     {
-        $this->handlers[] = $callable;
+        if ($callable) {
+            $this->handlers[] = $callable;
+        }
 
         return $this;
     }