diff --git a/workspace.h b/workspace.h
--- a/workspace.h
+++ b/workspace.h
@@ -324,8 +324,6 @@
     void setShowingDesktop(bool showing);
     bool showingDesktop() const;
 
-    void sendPingToWindow(xcb_window_t w, xcb_timestamp_t timestamp);   // Called from X11Client::pingWindow()
-
     void removeClient(X11Client *);   // Only called from X11Client::destroyClient() or X11Client::releaseWindow()
     void setActiveClient(AbstractClient*);
     Group* findGroup(xcb_window_t leader) const;
diff --git a/workspace.cpp b/workspace.cpp
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -1240,13 +1240,6 @@
     c->sendToScreen(screen);
 }
 
-void Workspace::sendPingToWindow(xcb_window_t window, xcb_timestamp_t timestamp)
-{
-    if (rootInfo()) {
-        rootInfo()->sendPing(window, timestamp);
-    }
-}
-
 /**
  * Delayed focus functions
  */
diff --git a/x11client.cpp b/x11client.cpp
--- a/x11client.cpp
+++ b/x11client.cpp
@@ -1856,7 +1856,7 @@
     // and the second time we'll show the "do you want to kill" prompt
     ping_timer->start(options->killPingTimeout() / 2);
     m_pingTimestamp = xTime();
-    workspace()->sendPingToWindow(window(), m_pingTimestamp);
+    rootInfo()->sendPing(window(), m_pingTimestamp);
 }
 
 void X11Client::gotPing(xcb_timestamp_t timestamp)