diff --git a/src/flb_pack.c b/src/flb_pack.c
index 05754cfe72d..524277a20e3 100644
--- a/src/flb_pack.c
+++ b/src/flb_pack.c
@@ -476,8 +476,7 @@ static int pack_print_fluent_record(size_t cnt, msgpack_unpacked result)
     flb_time_pop_from_msgpack(&tms, &result, &obj);
     flb_metadata_pop_from_msgpack(&metadata, &result, &obj);
 
-    fprintf(stdout, "[%zd] [%"PRIu32".%09lu, ", cnt,
-            (uint32_t) tms.tm.tv_sec, tms.tm.tv_nsec);
+    fprintf(stdout, "[%zd] [%"PRId32".%09lu, ", cnt, (int32_t) tms.tm.tv_sec, tms.tm.tv_nsec);
 
     msgpack_object_print(stdout, *metadata);