diff --git a/src/Window.cc b/src/Window.cc
index 44cfebd2..60ecaca4 100644
--- a/src/Window.cc
+++ b/src/Window.cc
@@ -289,6 +289,7 @@ FluxboxWindow::FluxboxWindow(WinClient &client, FbWinFrameTheme &tm,
     m_diesig(*this),
     m_focussig(*this),
     m_titlesig(*this),
+    m_attentionsig(*this),
     m_themelistener(*this),
     moving(false), resizing(false), shaded(false),
     iconic(false), focused(false),