diff --git a/frame/main.cpp b/frame/main.cpp
index deb78a5af..0de8a41d7 100644
--- a/frame/main.cpp
+++ b/frame/main.cpp
@@ -9,7 +9,11 @@
 #include <unistd.h>
 #include "dbus/dbusdockadaptors.h"
 DWIDGET_USE_NAMESPACE
+#ifdef DCORE_NAMESPACE
 DCORE_USE_NAMESPACE
+#else
+DUTIL_USE_NAMESPACE
+#endif
 
 // let startdde know that we've already started.
 void RegisterDdeSession()