diff --git a/src/kernel/qapplication_x11.cpp b/src/kernel/qapplication_x11.cpp
index f5f2701a..0148f876 100644
--- a/src/kernel/qapplication_x11.cpp
+++ b/src/kernel/qapplication_x11.cpp
@@ -5806,7 +5806,7 @@ void qt_insert_sip( TQWidget* scrolled_widget, int dx, int dy )
     TQScrollInProgress* sip = new TQScrollInProgress( scrolled_widget, dx, dy );
     sip_list->append( sip );
 
-    XClientMessageEvent client_message;
+    XClientMessageEvent client_message = {};
     client_message.type = ClientMessage;
     client_message.window = scrolled_widget->winId();
     client_message.format = 32;