diff --git a/src/plugins/silversearcher/findinfilessilversearcher.h b/src/plugins/silversearcher/findinfilessilversearcher.h
index 6c38f14fa38..8d0ebdd2c48 100644
--- a/src/plugins/silversearcher/findinfilessilversearcher.h
+++ b/src/plugins/silversearcher/findinfilessilversearcher.h
@@ -32,7 +32,9 @@
 
 #include <QPointer>
 
+QT_BEGIN_NAMESPACE
 class QLineEdit;
+QT_END_NAMESPACE
 
 namespace SilverSearcher {