diff --git a/src/test/modules/test_slru/test_slru.c b/src/test/modules/test_slru/test_slru.c
index 2e4492900af..32750930e43 100644
--- a/src/test/modules/test_slru/test_slru.c
+++ b/src/test/modules/test_slru/test_slru.c
@@ -151,7 +151,7 @@ test_slru_page_sync(PG_FUNCTION_ARGS)
 	ftag.segno = pageno / SLRU_PAGES_PER_SEGMENT;
 	SlruSyncFileTag(TestSlruCtl, &ftag, path);
 
-	elog(NOTICE, "Called SlruSyncFileTag() for segment %" PRId64 " on path %s",
+	elog(NOTICE, "Called SlruSyncFileTag() for segment %" PRIu64 " on path %s",
 		 ftag.segno, path);
 
 	PG_RETURN_VOID();
@@ -166,7 +166,7 @@ test_slru_page_delete(PG_FUNCTION_ARGS)
 	ftag.segno = pageno / SLRU_PAGES_PER_SEGMENT;
 	SlruDeleteSegment(TestSlruCtl, ftag.segno);
 
-	elog(NOTICE, "Called SlruDeleteSegment() for segment %" PRId64,
+	elog(NOTICE, "Called SlruDeleteSegment() for segment %" PRIu64,
 		 ftag.segno);
 
 	PG_RETURN_VOID();