diff --git a/src/shared/trk/trkutils.h b/src/shared/trk/trkutils.h
index 3648619373053b1a600a12653f26cf2ce5a6b477..4ba51fa42b14c01c8c0c938e8deedc9dfd20ede0 100644
--- a/src/shared/trk/trkutils.h
+++ b/src/shared/trk/trkutils.h
@@ -37,7 +37,9 @@
 
 typedef unsigned char byte;
 
+QT_BEGIN_NAMESPACE
 class QDateTime;
+QT_END_NAMESPACE
 
 namespace trk {