diff --git a/qt4/immodule/candidatewindow.cpp b/qt4/immodule/candidatewindow.cpp
index 0ed8996..467c71b 100644
--- a/qt4/immodule/candidatewindow.cpp
+++ b/qt4/immodule/candidatewindow.cpp
@@ -113,6 +113,7 @@ CandidateWindow::~CandidateWindow()
 
 void CandidateWindow::popup()
 {
+    QApplication::focusWidget()->window()->installEventFilter( this );
     raise();
     show();
 }
@@ -509,6 +510,16 @@ QSize CandidateWindow::sizeHint() const
     return QSize( width, height );
 }
 
+bool CandidateWindow::eventFilter( QObject *obj, QEvent *event )
+{
+    Q_UNUSED( obj )
+    if ( event->type() == QEvent::Move ) {
+        QMoveEvent *moveEvent = static_cast<QMoveEvent *>( event );
+        move( pos() + moveEvent->pos() - moveEvent->oldPos() );
+    }
+    return false;
+}
+
 QSize CandidateListView::sizeHint() const
 {
     // frame width
diff --git a/qt4/immodule/candidatewindow.h b/qt4/immodule/candidatewindow.h
index 54b5f19..89e1682 100644
--- a/qt4/immodule/candidatewindow.h
+++ b/qt4/immodule/candidatewindow.h
@@ -89,6 +89,8 @@ protected:
     virtual void moveEvent( QMoveEvent * );
     virtual void resizeEvent( QResizeEvent * );
 
+    bool eventFilter( QObject *obj, QEvent *event );
+
     QUimInputContext *ic;
 
     CandidateListView *cList;