diff --git a/include/core/converter.h b/include/core/converter.h
index 3833e0d6..1ac4bd1a 100644
--- a/include/core/converter.h
+++ b/include/core/converter.h
@@ -70,13 +70,17 @@ struct DefaultConverter {
         if (!v.canConvert<T>()) {
             if (errors) errors->append(QString("Can't convert from JSON to type '%1'").arg(v.typeName()));
         } else {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             // 'canConvert' is only true if a conversion between types is theoretically possible,
             // not necessarily if this value can be converted. e.g. "2" can be converted to int (2),
             // but "hello world" cannot be converted to int and becomes 0.
+            // For older versions of Qt, we rely on QVariant::value.
+
             T value;
             bool ok = QMetaType::convert(v.metaType(), v.constData(), QMetaType::fromType<T>(), &value);
             if (ok) return value;
             else if (errors) errors->append(QString("Failed to convert JSON value to type '%1'").arg(v.typeName()));
+#endif
         }
         // For failed conversion, return a default constructed value.
         return v.value<T>();