diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 36f65e2b8b5772f16e644bfa109f89393c893fd3..f274e19598858979a3d9bf32b75fe1f62fce426a 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1791,7 +1791,7 @@ static int perf_counter_read_group(struct perf_counter *counter,
 	size += err;
 
 	list_for_each_entry(sub, &leader->sibling_list, list_entry) {
-		err = perf_counter_read_entry(counter, read_format,
+		err = perf_counter_read_entry(sub, read_format,
 				buf + size);
 		if (err < 0)
 			return err;