diff --git a/src/core/main_window.cpp b/src/core/main_window.cpp
index 0271cdf07..c47a0f335 100644
--- a/src/core/main_window.cpp
+++ b/src/core/main_window.cpp
@@ -229,7 +229,7 @@ mainWindow::~mainWindow()
 
 	// destroy config-manager (which automatically saves config-file)
 */
-	delete eng();
+	eng()->close();
 }