diff --git a/src/libs/utils/smallstring.h b/src/libs/utils/smallstring.h
index e5c303430ca..c424e9e1ab2 100644
--- a/src/libs/utils/smallstring.h
+++ b/src/libs/utils/smallstring.h
@@ -199,10 +199,13 @@ public:
     SmallStringView toStringView() const noexcept { return SmallStringView(data(), size()); }
 
     operator SmallStringView() const noexcept { return SmallStringView(data(), size()); }
+
+ #if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
     explicit operator QLatin1StringView() const noexcept
     {
         return QLatin1StringView(data(), Utils::ssize(*this));
     }
+#endif
 
     operator QUtf8StringView() const noexcept
     {
diff --git a/src/libs/utils/smallstringview.h b/src/libs/utils/smallstringview.h
index 28f8b781501..5a272178196 100644
--- a/src/libs/utils/smallstringview.h
+++ b/src/libs/utils/smallstringview.h
@@ -79,10 +79,12 @@ public:
 
     explicit operator QByteArray() const { return QByteArray(data(), int(size())); }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
     explicit operator QLatin1StringView() const noexcept
     {
         return QLatin1StringView(data(), Utils::ssize(*this));
     }
+#endif
 
     operator QUtf8StringView() const noexcept
     {