--- test/unit/util.c.orig
+++ test/unit/util.c
@@ -602,7 +602,7 @@ test_unit(void)
 #else
   TEST_CHECK(tspec.tv_sec_high == htonl(TV_NOHIGHSEC));
 #endif
-  TEST_CHECK(tspec.tv_sec_low == htonl(ts.tv_sec));
+  TEST_CHECK(tspec.tv_sec_low == htonl((uint32_t) ts.tv_sec));
   TEST_CHECK(tspec.tv_nsec == htonl(ts.tv_nsec));
   UTI_TimespecNetworkToHost(&tspec, &ts2);
   TEST_CHECK(!UTI_CompareTimespecs(&ts, &ts2));