diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index bd63bd14417f..5cf802b6c550 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -2139,7 +2139,7 @@ static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
 static int cs_etm__process_queues(struct cs_etm_auxtrace *etm)
 {
 	int ret = 0;
-	unsigned int cs_queue_nr, queue_nr;
+	unsigned int cs_queue_nr, queue_nr, i;
 	u8 trace_chan_id;
 	u64 timestamp;
 	struct auxtrace_queue *queue;