diff --git a/pkg/innerring/processors/netmap/internal_events.go b/pkg/innerring/processors/netmap/internal_events.go
new file mode 100644
index 000000000..6b3251fbf
--- /dev/null
+++ b/pkg/innerring/processors/netmap/internal_events.go
@@ -0,0 +1,9 @@
+package netmap
+
+// netmapCleanupTick is a event to remove offline nodes.
+type netmapCleanupTick struct {
+	epoch uint64
+}
+
+// MorphEvent implements Event interface.
+func (netmapCleanupTick) MorphEvent() {}