diff --git a/tools/perf/lib/include/perf/event.h b/tools/perf/lib/include/perf/event.h
index 71045ea8214c8..86a7795934059 100644
--- a/tools/perf/lib/include/perf/event.h
+++ b/tools/perf/lib/include/perf/event.h
@@ -56,4 +56,9 @@ struct lost_event {
 	__u64			 lost;
 };
 
+struct lost_samples_event {
+	struct perf_event_header header;
+	__u64			 lost;
+};
+
 #endif /* __LIBPERF_EVENT_H */
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 4a3f50203d045..976a8f00d2a29 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -27,11 +27,6 @@
 #define PRI_lx64 PRIx64
 #endif
 
-struct lost_samples_event {
-	struct perf_event_header header;
-	u64 lost;
-};
-
 /*
  * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID
  */
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 1ad6e984c2f56..823aaf7b1b83b 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -653,7 +653,7 @@ int machine__process_lost_event(struct machine *machine __maybe_unused,
 int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
 					union perf_event *event, struct perf_sample *sample)
 {
-	dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
+	dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n",
 		    sample->id, event->lost_samples.lost);
 	return 0;
 }