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-rw-r--r--tools/perf/util/trace-event-parse.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index eae56050308..7021dc1b0ca 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -941,7 +941,8 @@ static int event_read_fields(struct event *event, struct format_field **fields)
if (read_expect_type(EVENT_ITEM, &token))
goto fail;
- /* add signed type */
+ if (strtoul(token, NULL, 0))
+ field->flags |= FIELD_IS_SIGNED;
free_token(token);
if (read_expected(EVENT_OP, ";") < 0)