diff --git a/src/basic/missing_timerfd.h b/src/basic/missing_timerfd.h
deleted file mode 100644
index a01a4eca3a..0000000000
--- a/src/basic/missing_timerfd.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-#pragma once
-
-#include <sys/timerfd.h>
-
-#include "macro.h"
-
-#ifndef TFD_TIMER_CANCEL_ON_SET
-#  define TFD_TIMER_CANCEL_ON_SET (1 << 1)
-#else
-assert_cc(TFD_TIMER_CANCEL_ON_SET == (1 << 1));
-#endif
diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index 2f5f14a67f..fcbedf9e9d 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -18,7 +18,6 @@
 #include "io-util.h"
 #include "log.h"
 #include "macro.h"
-#include "missing_timerfd.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"