diff --git a/src/pbs.cpp b/src/pbs.cpp
index 3e834d4c4b..970b45cbda 100644
--- a/src/pbs.cpp
+++ b/src/pbs.cpp
@@ -1540,7 +1540,7 @@ void PBSWaitingPositionRestrictedSignalState::TraceRestrictExecuteResEndSlotIntl
 	if (prog->actions_used_flags & actions_used_flags) {
 		TraceRestrictProgramResult out;
 		TraceRestrictProgramInput input(this->tile, this->trackdir, &VehiclePosTraceRestrictPreviousSignalCallback, nullptr);
-		input.permitted_slot_operations = TRPISP_PBS_RES_END_ACQUIRE | TRPISP_PBS_RES_END_RELEASE;
+		input.permitted_slot_operations = TRPISP_PBS_RES_END_ACQUIRE;
 		if (tb_entrance_slots) input.permitted_slot_operations = TRPISP_ACQUIRE;
 		prog->Execute(v, input, out);
 	}
diff --git a/src/tracerestrict.cpp b/src/tracerestrict.cpp
index 70e649c105..5ed9937e4d 100644
--- a/src/tracerestrict.cpp
+++ b/src/tracerestrict.cpp
@@ -774,7 +774,7 @@ void TraceRestrictProgram::Execute(const Train* v, const TraceRestrictProgramInp
 								break;
 
 							case TRSCOF_PBS_RES_END_RELEASE:
-								if (input.permitted_slot_operations & TRPISP_PBS_RES_END_RELEASE) {
+								if (input.permitted_slot_operations & TRPISP_PBS_RES_END_ACQUIRE) {
 									slot->Vacate(v->index);
 								} else if ((input.permitted_slot_operations & TRPISP_PBS_RES_END_ACQ_DRY) && (this->actions_used_flags & TRPAUF_PBS_RES_END_SIMULATE)) {
 									slot->VacateUsingTemporaryState(v->index, &pbs_res_end_acq_dry_slot_temporary_state);
diff --git a/src/tracerestrict.h b/src/tracerestrict.h
index 676262ca5d..077478b4f6 100644
--- a/src/tracerestrict.h
+++ b/src/tracerestrict.h
@@ -486,11 +486,10 @@ enum TraceRestrictProgramInputSlotPermissions : uint8_t {
 	TRPISP_ACQUIRE                = 1 << 0,  ///< Slot acquire is permitted
 	TRPISP_RELEASE_BACK           = 1 << 1,  ///< Slot release (back) is permitted
 	TRPISP_RELEASE_FRONT          = 1 << 2,  ///< Slot release (front) is permitted
-	TRPISP_PBS_RES_END_ACQUIRE    = 1 << 3,  ///< Slot acquire (PBS reservations ending at this signal) is permitted
-	TRPISP_PBS_RES_END_ACQ_DRY    = 1 << 4,  ///< Dry-run slot acquire (PBS reservations ending at this signal) is permitted
-	TRPISP_PBS_RES_END_RELEASE    = 1 << 5,  ///< Slot release (PBS reservations ending at this signal) is permitted
+	TRPISP_PBS_RES_END_ACQUIRE    = 1 << 3,  ///< Slot acquire/release (PBS reservations ending at this signal) is permitted
+	TRPISP_PBS_RES_END_ACQ_DRY    = 1 << 4,  ///< Dry-run slot acquire/release (PBS reservations ending at this signal) is permitted
+	TRPISP_ACQUIRE_TEMP_STATE     = 1 << 5,  ///< Slot acquire/release is permitted, using temporary state, TraceRestrictProgramInput::slot_temporary_state must be set
 	TRPISP_CHANGE_COUNTER         = 1 << 6,  ///< Change counter value is permitted
-	TRPISP_ACQUIRE_TEMP_STATE     = 1 << 7,  ///< Slot acquire is permitted, using temporary state, TraceRestrictProgramInput::slot_temporary_state must be set
 };
 DECLARE_ENUM_AS_BIT_SET(TraceRestrictProgramInputSlotPermissions)