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 eae560503086..7021dc1b0ca6 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)