1 files changed, 4 insertions, 0 deletions

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 632e40e5ceca..40399cbcca77 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -14,6 +14,7 @@ struct thread *thread__new(pid_t pid)
         if (self != NULL) {
                 map_groups__init(&self->mg);
                 self->pid = pid;
+                self->ppid = -1;
                 self->comm = malloc(32);
                 if (self->comm)
                         snprintf(self->comm, 32, ":%d", self->pid);
@@ -82,5 +83,8 @@ int thread__fork(struct thread *self, struct thread *parent)
         for (i = 0; i < MAP__NR_TYPES; ++i)
                 if (map_groups__clone(&self->mg, &parent->mg, i) < 0)
                         return -ENOMEM;
+
+        self->ppid = parent->pid;
+
         return 0;
 }