diff --git a/tools/testing/selftests/mm/hugetlb-mmap.c b/tools/testing/selftests/mm/hugetlb-mmap.c
index 0f2aad1b7dbd..2edbc992e6bc 100644
--- a/tools/testing/selftests/mm/hugetlb-mmap.c
+++ b/tools/testing/selftests/mm/hugetlb-mmap.c
@@ -122,7 +122,7 @@ int main(int argc, char **argv)
 		hugepage_size = default_huge_page_size();
 		if (!hugepage_size)
 			ksft_exit_skip("Could not detect default hugetlb page size.");
-		ksft_print_msg("Default size hugepages (%lu kB)\n", hugepage_size >> 10);
+		ksft_print_msg("Default size hugepages (%zu kB)\n", hugepage_size >> 10);
 	}
 
 	/* munmap will fail if the length is not page aligned */
@@ -131,7 +131,7 @@ int main(int argc, char **argv)
 
 	hugetlb_set_nr_pages(hugepage_size, nr);
 	if (hugetlb_free_pages(hugepage_size) < nr)
-		ksft_exit_skip("Not enough %lu Kb pages\n", hugepage_size >> 10);
+		ksft_exit_skip("Not enough %zu Kb pages\n", hugepage_size >> 10);
 
 	ksft_set_plan(2);
 	ksft_print_msg("Mapping %lu Mbytes\n", (unsigned long)length >> 20);