diff --git a/Pdf4QtLib/sources/pdfutils.h b/Pdf4QtLib/sources/pdfutils.h
index 4665374..cfaa5da 100644
--- a/Pdf4QtLib/sources/pdfutils.h
+++ b/Pdf4QtLib/sources/pdfutils.h
@@ -733,6 +733,8 @@ private:
     std::vector<ClosedInterval> m_intervals;
 };
 
+QDataStream& operator>>(QDataStream& stream, long unsigned int &i);
+
 template<typename T>
 QDataStream& operator>>(QDataStream& stream, std::vector<T>& vector)
 {
@@ -759,8 +761,6 @@ QDataStream& operator<<(QDataStream& stream, const std::vector<T>& vector)
     return stream;
 }
 
-QDataStream& operator>>(QDataStream& stream, long unsigned int &i);
-
 template<typename T, size_t Size>
 QDataStream& operator>>(QDataStream& stream, std::array<T, Size>& array)
 {