1 files changed, 5 insertions, 3 deletions

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 00d8274730b4..0041aedf2297 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -375,9 +375,11 @@ struct perf_event_mmap_page {
         __u64   time_running;           /* time event on cpu */
         union {
                 __u64   capabilities;
-                __u64   cap_usr_time  : 1,
-                        cap_usr_rdpmc : 1,
-                        cap_____res   : 62;
+                struct {
+                        __u64   cap_usr_time            : 1,
+                                cap_usr_rdpmc           : 1,
+                                cap_____res             : 62;
+                };
         };
 
         /*