--- a/project_files/hedgewars.pro	Thu Mar 15 17:53:34 2018 +0100
+++ b/project_files/hedgewars.pro	Thu Mar 15 21:15:16 2018 +0100
@@ -16,6 +16,7 @@
 
 DESTDIR = ../bin
 
+QT += widgets
 QT += network
 QT += webkit