1 files changed, 3 insertions, 2 deletions

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index af0a5046d743..87a1aca4a424 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -53,11 +53,12 @@ static inline unsigned long long rdclock(void)
         _min1 < _min2 ? _min1 : _min2; })
 
 static inline int
-sys_perf_counter_open(struct perf_counter_attr *attr_uptr,
+sys_perf_counter_open(struct perf_counter_attr *attr,
                       pid_t pid, int cpu, int group_fd,
                       unsigned long flags)
 {
-        return syscall(__NR_perf_counter_open, attr_uptr, pid, cpu,
+        attr->size = sizeof(*attr);
+        return syscall(__NR_perf_counter_open, attr, pid, cpu,
                        group_fd, flags);
 }