diff --git a/libs/piqt/piqt.h b/libs/piqt/piqt.h
index 6e733a6..f07a268 100644
--- a/libs/piqt/piqt.h
+++ b/libs/piqt/piqt.h
@@ -123,7 +123,7 @@ inline const PIVariantTypes::Color Q2PIColor(const QColor & v) {return PIVariant
 
 
 template<typename T>
-inline const QVector<T> PI2QVector(const PIVector<T> & v) {QVector<T> ret(v.size_s()); for (int i = 0; i < v.size_s(); ++i) ret[i] = v[i]; return ret;}
+inline const QVector<T> PI2QVector(const PIVector<T> & v) {QVector<T> ret; ret.reserve(v.size_s()); for (int i = 0; i < v.size_s(); ++i) ret << v[i]; return ret;}
 template<typename T>
 inline const PIVector<T> Q2PIVector(const QVector<T> & v) {if (v.isEmpty()) return PIVector<T>(); return PIVector<T>(v.constData(), (size_t)v.size());}