diff --git a/repos/base-hw/src/core/spec/riscv/timer.cc b/repos/base-hw/src/core/spec/riscv/timer.cc
index 4538533bfb..1747414ba5 100644
--- a/repos/base-hw/src/core/spec/riscv/timer.cc
+++ b/repos/base-hw/src/core/spec/riscv/timer.cc
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (C) 2021 Genode Labs GmbH
+ * Copyright (C) 2021-2022 Genode Labs GmbH
  *
  * This file is part of the Genode OS framework, which is distributed
  * under the terms of the GNU Affero General Public License version 3.
@@ -39,8 +39,7 @@ time_t Board::Timer::stime() const
 
 void Timer::_start_one_shot(time_t const ticks)
 {
-	_device.last_time = _device.stime();
-	Sbi::set_timer(_device.last_time + ticks);
+	Sbi::set_timer(_time + ticks);
 }
 
 
@@ -58,7 +57,7 @@ time_t Timer::_max_value() const {
 
 time_t Timer::_duration() const
 {
-	return _device.stime() - _device.last_time;
+	return _device.stime() - _time;
 }
 
 
diff --git a/repos/base-hw/src/core/spec/riscv/timer.h b/repos/base-hw/src/core/spec/riscv/timer.h
index 04138565cd..a1d30a1d90 100644
--- a/repos/base-hw/src/core/spec/riscv/timer.h
+++ b/repos/base-hw/src/core/spec/riscv/timer.h
@@ -31,8 +31,6 @@ struct Board::Timer
 		TICKS_PER_US = TICKS_PER_MS / 1000,
 	};
 
-	Kernel::time_t last_time { 0 };
-
 	Kernel::time_t stime() const;
 
 	Timer(unsigned);