diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index bc84a52..4ca427f 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -66,6 +66,7 @@
 	self->mmap_window = 32;
 	self->cwd = NULL;
 	self->cwdlen = 0;
+	self->unknown_events = 0;
 	map_groups__init(&self->kmaps);
 
 	if (perf_session__create_kernel_maps(self) < 0)
@@ -239,7 +240,7 @@
 	case PERF_RECORD_UNTHROTTLE:
 		return ops->process_unthrottle_event(event, self);
 	default:
-		ops->total_unknown++;
+		self->unknown_events++;
 		return -1;
 	}
 }
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 5771ccb..585937b 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -20,6 +20,7 @@
 	struct thread		*last_match;
 	struct events_stats	events_stats;
 	unsigned long		event_total[PERF_RECORD_MAX];
+	unsigned long		unknown_events;
 	struct rb_root		hists;
 	u64			sample_type;
 	int			fd;
@@ -40,7 +41,6 @@
 	event_op	process_read_event;
 	event_op	process_throttle_event;
 	event_op	process_unthrottle_event;
-	unsigned long	total_unknown;
 	bool		full_paths;
 };