diff --git a/include/nlohmann/json_view.hpp b/include/nlohmann/json_view.hpp
index 9df50d93b..b5af4852a 100644
--- a/include/nlohmann/json_view.hpp
+++ b/include/nlohmann/json_view.hpp
@@ -715,7 +715,7 @@ class basic_json_view
     /// decoded strings); the estimate sizes the output buffer of dump()
     std::size_t source_extent() const noexcept
     {
-        const node* const end = m_doc->tape + m_doc->tape_size;
+        const node* const end = m_doc->nodes + m_doc->node_count;
         if ((m_node->flags & detail::view::node_flags::storage) != 0)
         {
             return m_node->len;
diff --git a/single_include/nlohmann/json_view.hpp b/single_include/nlohmann/json_view.hpp
index 014cf9bff..a590c7fd5 100644
--- a/single_include/nlohmann/json_view.hpp
+++ b/single_include/nlohmann/json_view.hpp
@@ -4645,7 +4645,7 @@ class basic_json_view
     /// decoded strings); the estimate sizes the output buffer of dump()
     std::size_t source_extent() const noexcept
     {
-        const node* const end = m_doc->tape + m_doc->tape_size;
+        const node* const end = m_doc->nodes + m_doc->node_count;
         if ((m_node->flags & detail::view::node_flags::storage) != 0)
         {
             return m_node->len;