3 files changed, 5 insertions, 5 deletions
diff --git a/src/commonlib/include/commonlib/timestamp_serialized.h b/src/commonlib/include/commonlib/timestamp_serialized.h
index 3d518b77b2..5c5e56b071 100644
--- a/src/commonlib/include/commonlib/timestamp_serialized.h
+++ b/src/commonlib/include/commonlib/timestamp_serialized.h
@@ -7,7 +7,7 @@
 
 struct timestamp_entry {
 	uint32_t	entry_id;
-	uint64_t	entry_stamp;
+	int64_t		entry_stamp;
 } __packed;
 
 struct timestamp_table {
diff --git a/src/include/timestamp.h b/src/include/timestamp.h
index 647cd13897..cbe9934069 100644
--- a/src/include/timestamp.h
+++ b/src/include/timestamp.h
@@ -19,7 +19,7 @@ void timestamp_init(uint64_t base);
  * inside REGION(timestamp) before cbmem comes online. For later stages, timestamps
  * added before cbmem_[recovery|initialize] calls will be lost.
  */
-void timestamp_add(enum timestamp_id id, uint64_t ts_time);
+void timestamp_add(enum timestamp_id id, int64_t ts_time);
 /* Calls timestamp_add with current timestamp. */
 void timestamp_add_now(enum timestamp_id id);
 
diff --git a/src/lib/timestamp.c b/src/lib/timestamp.c
index 7347d07b16..f8e4ab840a 100644
--- a/src/lib/timestamp.c
+++ b/src/lib/timestamp.c
@@ -102,7 +102,7 @@ static const char *timestamp_name(enum timestamp_id id)
 }
 
 static void timestamp_add_table_entry(struct timestamp_table *ts_table,
-				      enum timestamp_id id, uint64_t ts_time)
+				      enum timestamp_id id, int64_t ts_time)
 {
 	struct timestamp_entry *tse;
 
@@ -117,7 +117,7 @@ static void timestamp_add_table_entry(struct timestamp_table *ts_table,
 		printk(BIOS_ERR, "ERROR: Timestamp table full\n");
 }
 
-void timestamp_add(enum timestamp_id id, uint64_t ts_time)
+void timestamp_add(enum timestamp_id id, int64_t ts_time)
 {
 	struct timestamp_table *ts_table;
 
@@ -135,7 +135,7 @@ void timestamp_add(enum timestamp_id id, uint64_t ts_time)
 	timestamp_add_table_entry(ts_table, id, ts_time);
 
 	if (CONFIG(TIMESTAMPS_ON_CONSOLE))
-		printk(BIOS_INFO, "Timestamp - %s: %llu\n", timestamp_name(id), ts_time);
+		printk(BIOS_INFO, "Timestamp - %s: %lld\n", timestamp_name(id), ts_time);
 }
 
 void timestamp_add_now(enum timestamp_id id)