diff --git a/configure.ac b/configure.ac
index 96b0d94c1..9d4723afb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,7 +79,6 @@ AC_CHECK_SIZEOF(pid_t)
 AC_CHECK_SIZEOF(uid_t)
 AC_CHECK_SIZEOF(gid_t)
 AC_CHECK_SIZEOF(dev_t)
-AC_CHECK_SIZEOF(time_t)
 AC_CHECK_SIZEOF(rlim_t,,[[
 #include <sys/time.h>
 #include <sys/resource.h>]])
diff --git a/src/shared/formats-util.h b/src/shared/formats-util.h
index ce516b117..0ef355830 100644
--- a/src/shared/formats-util.h
+++ b/src/shared/formats-util.h
@@ -46,14 +46,6 @@
 #  error Unknown gid_t size
 #endif
 
-#if SIZEOF_TIME_T == 8
-#  define PRI_TIME PRIi64
-#elif SIZEOF_TIME_T == 4
-#  define PRI_TIME PRIu32
-#else
-#  error Unknown time_t size
-#endif
-
 #if SIZEOF_RLIM_T == 8
 #  define RLIM_FMT "%" PRIu64
 #elif SIZEOF_RLIM_T == 4
diff --git a/src/udev/udevadm-monitor.c b/src/udev/udevadm-monitor.c
index fa4a4ab9a..e05390766 100644
--- a/src/udev/udevadm-monitor.c
+++ b/src/udev/udevadm-monitor.c
@@ -46,9 +46,9 @@ static void print_device(struct udev_device *device, const char *source, int pro
         struct timespec ts;
 
         clock_gettime(CLOCK_MONOTONIC, &ts);
-        printf("%-6s[%"PRI_TIME".%06ld] %-8s %s (%s)\n",
+        printf("%-6s[%"PRIi64".%06ld] %-8s %s (%s)\n",
                source,
-               ts.tv_sec, ts.tv_nsec/1000,
+               (int64_t)ts.tv_sec, ts.tv_nsec/1000,
                udev_device_get_action(device),
                udev_device_get_devpath(device),
                udev_device_get_subsystem(device));