diff --git a/AK/Vector.h b/AK/Vector.h
index 575965daee2..2870f906710 100644
--- a/AK/Vector.h
+++ b/AK/Vector.h
@@ -172,6 +172,10 @@ public:
 
     void append(Vector<T>&& other)
     {
+        if (!m_impl) {
+            m_impl = move(other.m_impl);
+            return;
+        }
         Vector<T> tmp = move(other);
         ensure_capacity(size() + tmp.size());
         for (auto&& v : tmp) {