diff --git a/src/JsonSerializationWriter.php b/src/JsonSerializationWriter.php
index b9fe461..3c29ed6 100644
--- a/src/JsonSerializationWriter.php
+++ b/src/JsonSerializationWriter.php
@@ -190,6 +190,8 @@ public function writeObjectValue(?string $key, $value, Parsable ...$additionalVa
         }
         if ($key !== null && $value !== null) {
             $this->writer [] = self::PROPERTY_SEPARATOR;
+            $this->writer []= '0';
+            array_pop($this->writer);
         }
     }