--- a/QTfrontend/ui/page/pagescheme.h	Sat Jun 27 23:38:45 2020 +0300
+++ b/QTfrontend/ui/page/pagescheme.h	Sun Jun 28 00:47:43 2020 +0300
@@ -90,6 +90,7 @@
         MinesTimeSpinBox * SB_MinesTime;
         QSpinBox * SB_Mines;
         QSpinBox * SB_AirMines;
+        QSpinBox * SB_Sentries;
         QSpinBox * SB_MineDuds;
         QSpinBox * SB_Explosives;
         QSpinBox * SB_RopeModifier;