diff --git a/include/rapidjson/schema.h b/include/rapidjson/schema.h
index a57a727..c1bb0a0 100644
--- a/include/rapidjson/schema.h
+++ b/include/rapidjson/schema.h
@@ -1733,6 +1733,10 @@ public:
             Allocator::Free(typeless_);
         }
 
+        uri_.SetNull();
+        error_.SetNull();
+        currentError_.SetNull();
+
         RAPIDJSON_DELETE(ownAllocator_);
     }