--- a/plugins/virtium/virtium-nvme.c
+++ b/plugins/virtium/virtium-nvme.c
@@ -32,14 +32,14 @@ static char vt_default_log_file_name[256
 struct vtview_log_header {
 	char				path[256];
 	char				test_name[256];
-	long				time_stamp;
+	time_t				time_stamp;
 	struct nvme_id_ctrl		raw_ctrl;
 	struct nvme_firmware_slot	raw_fw;
 };
 
 struct vtview_smart_log_entry {
 	char			path[256];
-	long			time_stamp;
+	time_t			time_stamp;
 	struct nvme_id_ns	raw_ns;
 	struct nvme_id_ctrl	raw_ctrl;
 	struct nvme_smart_log	raw_smart;
@@ -127,7 +127,7 @@ static void vt_convert_smart_data_to_hum
 
 	capacity = le64_to_cpu(smart->raw_ns.nsze) * lba;
 
-	snprintf(tempbuff, sizeof(tempbuff), "log;%s;%lu;%s;%s;%-.*s;", smart->raw_ctrl.sn, smart->time_stamp, smart->path,
+	snprintf(tempbuff, sizeof(tempbuff), "log;%s;%" PRId64 ";%s;%s;%-.*s;", smart->raw_ctrl.sn, smart->time_stamp, smart->path,
 		smart->raw_ctrl.mn, (int)sizeof(smart->raw_ctrl.fr), smart->raw_ctrl.fr);
 	strcpy(text, tempbuff);
 	snprintf(tempbuff, sizeof(tempbuff), "Capacity;%lf;", capacity / 1000000000);