diff --git a/tools/perf/lib/include/perf/event.h b/tools/perf/lib/include/perf/event.h
index 3729a7d9253e..b90a8a21e613 100644
--- a/tools/perf/lib/include/perf/event.h
+++ b/tools/perf/lib/include/perf/event.h
@@ -36,4 +36,11 @@ struct comm_event {
 	char			 comm[16];
 };
 
+struct namespaces_event {
+	struct perf_event_header header;
+	__u32			 pid, tid;
+	__u64			 nr_namespaces;
+	struct perf_ns_link_info link_info[];
+};
+
 #endif /* __LIBPERF_EVENT_H */
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index e8973a783267..0d3ac4fd3ecf 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -27,13 +27,6 @@
 #define PRI_lx64 PRIx64
 #endif
 
-struct namespaces_event {
-	struct perf_event_header header;
-	u32 pid, tid;
-	u64 nr_namespaces;
-	struct perf_ns_link_info link_info[];
-};
-
 struct fork_event {
 	struct perf_event_header header;
 	u32 pid, ppid;