diff --git a/src/corelib/compat/removed_api.cpp b/src/corelib/compat/removed_api.cpp
index 9fe3827d86..99c08f1673 100644
--- a/src/corelib/compat/removed_api.cpp
+++ b/src/corelib/compat/removed_api.cpp
@@ -672,6 +672,13 @@ QByteArray QByteArray::chopped(qsizetype n) const
 { return sliced(0, size() - n); }
 #endif
 
+#include "qcborstreamreader.h"
+
+QCborError QCborStreamReader::lastError()
+{
+    return std::as_const(*this).lastError();
+}
+
 #include "qdatetime.h"
 
 QDateTime::QDateTime(QDate date, QTime time, const QTimeZone &timeZone)
diff --git a/src/corelib/serialization/qcborstreamreader.cpp b/src/corelib/serialization/qcborstreamreader.cpp
index a3053953ac..47d1f8e014 100644
--- a/src/corelib/serialization/qcborstreamreader.cpp
+++ b/src/corelib/serialization/qcborstreamreader.cpp
@@ -929,7 +929,7 @@ void QCborStreamReader::reset()
 
    \sa isValid()
  */
-QCborError QCborStreamReader::lastError()
+QCborError QCborStreamReader::lastError() const
 {
     return d->lastError;
 }
diff --git a/src/corelib/serialization/qcborstreamreader.h b/src/corelib/serialization/qcborstreamreader.h
index cc4b9cdf42..5a870d17a3 100644
--- a/src/corelib/serialization/qcborstreamreader.h
+++ b/src/corelib/serialization/qcborstreamreader.h
@@ -77,7 +77,10 @@ public:
     void clear();
     void reset();
 
+#if QT_CORE_REMOVED_SINCE(6, 6)
     QCborError lastError();
+#endif
+    QCborError lastError() const;
 
     qint64 currentOffset() const;