diff --git a/frame/util/dockpopupwindow.h b/frame/util/dockpopupwindow.h
index 8d891c1a1..cf178cbeb 100644
--- a/frame/util/dockpopupwindow.h
+++ b/frame/util/dockpopupwindow.h
@@ -6,10 +6,9 @@
 #define DOCKPOPUPWINDOW_H
 
 #include <darrowrectangle.h>
-#include <dregionmonitor.h>
+#include <DRegionMonitor>
 #include <DWindowManagerHelper>
 
-DWIDGET_USE_NAMESPACE
 DGUI_USE_NAMESPACE
 
 class DockPopupWindow : public Dtk::Widget::DArrowRectangle
diff --git a/tests/util/ut_dockpopupwindow.cpp b/tests/util/ut_dockpopupwindow.cpp
index 1e6d3b4e9..4f75160e8 100644
--- a/tests/util/ut_dockpopupwindow.cpp
+++ b/tests/util/ut_dockpopupwindow.cpp
@@ -13,7 +13,7 @@
 
 #include <DRegionMonitor>
 
-DWIDGET_USE_NAMESPACE
+DGUI_USE_NAMESPACE
 
 class Test_DockPopupWindow : public QObject, public ::testing::Test
 {