diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 393f3749f330..338bdea96541 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1259,6 +1259,7 @@ void ConfigSearchWindow::search(void)
  * Construct the complete config widget
  */
 ConfigMainWindow::ConfigMainWindow(void)
+	: searchWindow(0)
 {
 	QMenuBar* menu;
 	bool ok;