diff --git a/examples/nvme/nvme_manage/nvme_manage.c b/examples/nvme/nvme_manage/nvme_manage.c
index 7516ae215..360cbaacb 100644
--- a/examples/nvme/nvme_manage/nvme_manage.c
+++ b/examples/nvme/nvme_manage/nvme_manage.c
@@ -568,14 +568,14 @@ add_ns(void)
 	}
 
 	printf("Please Input Namespace Size (in LBAs):\n");
-	if (!scanf("%" SCNi64, &ns_size)) {
+	if (!scanf("%" SCNu64, &ns_size)) {
 		printf("Invalid Namespace Size\n");
 		while (getchar() != '\n');
 		return;
 	}
 
 	printf("Please Input Namespace Capacity (in LBAs):\n");
-	if (!scanf("%" SCNi64, &ns_capacity)) {
+	if (!scanf("%" SCNu64, &ns_capacity)) {
 		printf("Invalid Namespace Capacity\n");
 		while (getchar() != '\n');
 		return;