diff --git a/src/corelib/text/qlocale.cpp b/src/corelib/text/qlocale.cpp
index f72991c764d..82ea7ebc447 100644
--- a/src/corelib/text/qlocale.cpp
+++ b/src/corelib/text/qlocale.cpp
@@ -465,7 +465,7 @@ QByteArray QLocalePrivate::bcp47Name(char separator) const
     return m_data->id().withLikelySubtagsRemoved().name(separator);
 }
 
-static qsizetype findLocaleIndexById(QLocaleId localeId)
+static qsizetype findLocaleIndexById(QLocaleId localeId) noexcept
 {
     qsizetype idx = locale_index[localeId.language_id];
     // If there are no locales for specified language (so we we've got the
@@ -484,7 +484,7 @@ static qsizetype findLocaleIndexById(QLocaleId localeId)
     return -1;
 }
 
-qsizetype QLocaleData::findLocaleIndex(QLocaleId lid)
+qsizetype QLocaleData::findLocaleIndex(QLocaleId lid) noexcept
 {
     QLocaleId localeId = lid;
     QLocaleId likelyId = localeId.withLikelySubtagsAdded();
@@ -853,7 +853,7 @@ static qsizetype defaultIndex()
     return data - locale_data;
 }
 
-const QLocaleData *QLocaleData::c()
+const QLocaleData *QLocaleData::c() noexcept
 {
     Q_ASSERT(locale_index[QLocale::C] == 0);
     return locale_data;
diff --git a/src/corelib/text/qlocale_p.h b/src/corelib/text/qlocale_p.h
index f911551eebd..ee65076780b 100644
--- a/src/corelib/text/qlocale_p.h
+++ b/src/corelib/text/qlocale_p.h
@@ -244,8 +244,8 @@ struct QLocaleData
 public:
     // Having an index for each locale enables us to have diverse sources of
     // data, e.g. calendar locales, as well as the main CLDR-derived data.
-    [[nodiscard]] static qsizetype findLocaleIndex(QLocaleId localeId);
-    [[nodiscard]] static const QLocaleData *c();
+    [[nodiscard]] static qsizetype findLocaleIndex(QLocaleId localeId) noexcept;
+    [[nodiscard]] static const QLocaleData *c() noexcept;
 
     enum DoubleForm {
         DFExponent = 0,