diff --git a/common/main/switch.h b/common/main/switch.h
index 7dad46d33..7ebd67251 100644
--- a/common/main/switch.h
+++ b/common/main/switch.h
@@ -139,7 +139,6 @@ enum TRIGGER_FLAG : uint16_t
 	SHIELD_DAMAGE =      2,    // Shield Damage Trigger
 	ENERGY_DRAIN =       4,    // Energy Drain Trigger
 	EXIT =               8,    // End of level Trigger
-	ON =                16,    // Whether Trigger is active
 	ONE_SHOT =          32,    // If Trigger can only be triggered once
 	MATCEN =            64,    // Trigger for materialization centers
 	ILLUSION_OFF =     128,    // Switch Illusion OFF trigger
@@ -157,7 +156,6 @@ enum TRIGGER_FLAG : uint16_t
 #define TRIGGER_SHIELD_DAMAGE TRIGGER_FLAG::SHIELD_DAMAGE
 #define TRIGGER_ENERGY_DRAIN TRIGGER_FLAG::ENERGY_DRAIN
 #define TRIGGER_EXIT TRIGGER_FLAG::EXIT
-#define TRIGGER_ON TRIGGER_FLAG::ON
 #define TRIGGER_ONE_SHOT TRIGGER_FLAG::ONE_SHOT
 #define TRIGGER_MATCEN TRIGGER_FLAG::MATCEN
 #define TRIGGER_ILLUSION_OFF TRIGGER_FLAG::ILLUSION_OFF
diff --git a/similar/editor/eswitch.cpp b/similar/editor/eswitch.cpp
index 1ee98784a..6c531260d 100644
--- a/similar/editor/eswitch.cpp
+++ b/similar/editor/eswitch.cpp
@@ -349,7 +349,7 @@ static window_event_result trigger_dialog_created(UI_DIALOG *const w, trigger_di
 	t->triggerFlag[4] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "One-shot");			i+=22;
 	t->triggerFlag[5] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Illusion ON");		i+=22;
 	t->triggerFlag[6] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Illusion OFF");		i+=22;
-	t->triggerFlag[7] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Trigger ON");			i+=22;
+	t->triggerFlag[7] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Unused");			i+=22;
 	t->triggerFlag[8] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Matcen Trigger"); 	i+=22;
 	t->triggerFlag[9] = ui_add_gadget_checkbox(w, 22, i, 16, 16, 0, "Secret Exit"); 		i+=22;
 #endif
@@ -434,7 +434,7 @@ window_event_result trigger_dialog_handler(UI_DIALOG *dlg,const d_event &event,
  			ui_checkbox_check(t->triggerFlag[4].get(), trig->flags & TRIGGER_ONE_SHOT);
  			ui_checkbox_check(t->triggerFlag[5].get(), trig->flags & TRIGGER_ILLUSION_ON);
  			ui_checkbox_check(t->triggerFlag[6].get(), trig->flags & TRIGGER_ILLUSION_OFF);
- 			ui_checkbox_check(t->triggerFlag[7].get(), trig->flags & TRIGGER_ON);
+			ui_checkbox_check(t->triggerFlag[7].get(), 0);
  			ui_checkbox_check(t->triggerFlag[8].get(), trig->flags & TRIGGER_MATCEN);
  			ui_checkbox_check(t->triggerFlag[9].get(), trig->flags & TRIGGER_SECRET_EXIT);
 #endif
@@ -464,7 +464,8 @@ window_event_result trigger_dialog_handler(UI_DIALOG *dlg,const d_event &event,
 		else if (GADGET_PRESSED(t->triggerFlag[6].get()))
 			trigger_flag_Markedside(TRIGGER_ILLUSION_OFF, t->triggerFlag[6]->flag);
 		else if (GADGET_PRESSED(t->triggerFlag[7].get()))
-			trigger_flag_Markedside(TRIGGER_ON, t->triggerFlag[7]->flag);
+		{
+		}
 		else if (GADGET_PRESSED(t->triggerFlag[8].get())) 
 			trigger_flag_Markedside(TRIGGER_MATCEN, t->triggerFlag[8]->flag);
 		else if (GADGET_PRESSED(t->triggerFlag[9].get())) 
diff --git a/similar/main/switch.cpp b/similar/main/switch.cpp
index 96c76b3af..51c10f504 100644
--- a/similar/main/switch.cpp
+++ b/similar/main/switch.cpp
@@ -568,8 +568,6 @@ window_event_result check_trigger(const vcsegptridx_t seg, const unsigned side,
 		auto &t = *vmtrgptr(trigger_num);
 		if (t.flags & TRIGGER_ONE_SHOT)
 		{
-			t.flags &= ~TRIGGER_ON;
-	
 			const shared_segment &csegp = *vcsegptr(seg->children[side]);
 			auto cside = find_connect_side(seg, csegp);
 			Assert(cside != side_none);
@@ -577,10 +575,6 @@ window_event_result check_trigger(const vcsegptridx_t seg, const unsigned side,
 			const auto cwall_num = csegp.sides[cside].wall_num;
 			if (cwall_num == wall_none)
 				return window_event_result::ignored;
-			
-			const auto ctrigger_num = vcwallptr(cwall_num)->trigger;
-			auto &ct = *vmtrgptr(ctrigger_num);
-			ct.flags &= ~TRIGGER_ON;
 		}
 #endif
 		if (Game_mode & GM_MULTI)
@@ -716,7 +710,7 @@ static trigger_action trigger_type_from_flags(short flags)
 
 static void v30_trigger_to_v31_trigger(trigger &t, const v30_trigger &trig)
 {
-	t.type        = trigger_type_from_flags(trig.flags & ~TRIGGER_ON);
+	t.type        = trigger_type_from_flags(trig.flags);
 	t.flags       = (trig.flags & TRIGGER_ONE_SHOT) ? trigger_behavior_flags::one_shot : trigger_behavior_flags{0};
 	t.num_links   = trig.num_links;
 	t.num_links   = trig.num_links;