diff --git a/src/shared/trk/trkutils.h b/src/shared/trk/trkutils.h
index 36486193730..4ba51fa42b1 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 {