diff --git a/src/basic/format-util.h b/src/basic/format-util.h
index 39a185f59b..ae42a8f89e 100644
--- a/src/basic/format-util.h
+++ b/src/basic/format-util.h
@@ -54,6 +54,12 @@
 #  error Unknown time_t size
 #endif
 
+#if defined __x86_64__ && defined __ILP32__
+#  define PRI_TIMEX PRIi64
+#else
+#  define PRI_TIMEX "li"
+#endif
+
 #if SIZEOF_RLIM_T == 8
 #  define RLIM_FMT "%" PRIu64
 #elif SIZEOF_RLIM_T == 4
diff --git a/src/timesync/timesyncd-manager.c b/src/timesync/timesyncd-manager.c
index 6a6c1577c6..11c495e291 100644
--- a/src/timesync/timesyncd-manager.c
+++ b/src/timesync/timesyncd-manager.c
@@ -379,9 +379,9 @@ static int manager_adjust_clock(Manager *m, double offset, int leap_sec) {
 
         log_debug("  status       : %04i %s\n"
                   "  time now     : %li.%03"PRI_USEC"\n"
-                  "  constant     : %li\n"
+                  "  constant     : %"PRI_TIMEX"\n"
                   "  offset       : %+.3f sec\n"
-                  "  freq offset  : %+li (%i ppm)\n",
+                  "  freq offset  : %+"PRI_TIMEX" (%i ppm)\n",
                   tmx.status, tmx.status & STA_UNSYNC ? "unsync" : "sync",
                   tmx.time.tv_sec, tmx.time.tv_usec / NSEC_PER_MSEC,
                   tmx.constant,