1 files changed, 9 insertions, 3 deletions
diff --git a/src/corelib/text/qstring.h b/src/corelib/text/qstring.h
index 5229c030e2..f53cb869c5 100644
--- a/src/corelib/text/qstring.h
+++ b/src/corelib/text/qstring.h
@@ -169,9 +169,13 @@ public:
     { return lastIndexOf(s, size(), cs); }
     [[nodiscard]] qsizetype lastIndexOf(QLatin1String s, qsizetype from, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
     { return QtPrivate::lastIndexOf(*this, from, s, cs); }
-    [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
+    [[nodiscard]] qsizetype lastIndexOf(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
+    { return lastIndexOf(c, -1, cs); }
+    [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
     { return QtPrivate::lastIndexOf(*this, from, QStringView(&c, 1), cs); }
-    [[nodiscard]] qsizetype lastIndexOf(QLatin1Char c, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
+    [[nodiscard]] qsizetype lastIndexOf(QLatin1Char c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
+    { return lastIndexOf(c, -1, cs); }
+    [[nodiscard]] qsizetype lastIndexOf(QLatin1Char c, qsizetype from, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
     { char ch = c.toLatin1(); return QtPrivate::lastIndexOf(*this, from, QLatin1String(&ch, 1), cs); }
 
     using value_type = const char;
@@ -521,7 +525,9 @@ public:
 #endif
     [[nodiscard]] qsizetype indexOf(QStringView s, qsizetype from = 0, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
     { return QtPrivate::findString(*this, from, s, cs); }
-    [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from = -1, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
+    [[nodiscard]] qsizetype lastIndexOf(QChar c, Qt::CaseSensitivity cs = Qt::CaseSensitive) const noexcept
+    { return lastIndexOf(c, -1, cs); }
+    [[nodiscard]] qsizetype lastIndexOf(QChar c, qsizetype from, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
     [[nodiscard]] qsizetype lastIndexOf(QLatin1String s, Qt::CaseSensitivity cs = Qt::CaseSensitive) const
     { return lastIndexOf(s, size(), cs); }
     [[nodiscard]] qsizetype lastIndexOf(QLatin1String s, qsizetype from, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;