diff --git a/src/Illuminate/Collections/LazyCollection.php b/src/Illuminate/Collections/LazyCollection.php
index ce84977aad99..e741ba0bf0a0 100644
--- a/src/Illuminate/Collections/LazyCollection.php
+++ b/src/Illuminate/Collections/LazyCollection.php
@@ -1740,6 +1740,8 @@ protected function passthru($method, array $params)
      */
     protected function now()
     {
-        return Carbon::now()->timestamp;
+        return class_exists(Carbon::class)
+            ? Carbon::now()->timestamp
+            : time();
     }
 }