diff --git a/src/plugins/qnx/blackberryutils.h b/src/plugins/qnx/blackberryutils.h
index 6dc8e826543..41c358dabb1 100644
--- a/src/plugins/qnx/blackberryutils.h
+++ b/src/plugins/qnx/blackberryutils.h
@@ -32,7 +32,9 @@
 #ifndef QNX_INTERNAL_BLACKBERRYUTILS_H
 #define QNX_INTERNAL_BLACKBERRYUTILS_H
 
+QT_BEGIN_NAMESPACE
 class QString;
+QT_END_NAMESPACE
 
 namespace Qnx {
 namespace Internal {