diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index eb222078b5e..50a58d5fe03 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -370,6 +370,8 @@ void CDBIterator::SeekImpl(std::span<const std::byte> key)
 
 std::span<const std::byte> CDBIterator::GetKeyImpl() const
 {
+    // The returned span borrows from the current iterator entry and is only
+    // valid until the iterator is advanced.
     return MakeByteSpan(m_impl_iter->iter->key());
 }
 
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 2eee6c1c023..75ac5fdb05b 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -153,7 +153,7 @@ public:
 
     template<typename K> bool GetKey(K& key) {
         try {
-            DataStream ssKey{GetKeyImpl()};
+            SpanReader ssKey{GetKeyImpl()};
             ssKey >> key;
         } catch (const std::exception&) {
             return false;