diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index 8f616e966d..ccf34312de 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -1307,7 +1307,7 @@ QMessageAuthenticationCode::~QMessageAuthenticationCode()
 /*!
     Resets message data. Calling this method doesn't affect the key.
 */
-void QMessageAuthenticationCode::reset()
+void QMessageAuthenticationCode::reset() noexcept
 {
     d->result.clear();
     d->messageHash.reset();
diff --git a/src/corelib/tools/qmessageauthenticationcode.h b/src/corelib/tools/qmessageauthenticationcode.h
index 9e7f9dfbdb..4e88138763 100644
--- a/src/corelib/tools/qmessageauthenticationcode.h
+++ b/src/corelib/tools/qmessageauthenticationcode.h
@@ -31,7 +31,7 @@ public:
     void swap(QMessageAuthenticationCode &other) noexcept
     { qt_ptr_swap(d, other.d); }
 
-    void reset();
+    void reset() noexcept;
 
 #if QT_CORE_REMOVED_SINCE(6, 6)
     void setKey(const QByteArray &key);