diff --git a/sys/npc.h b/sys/npc.h
index 70f81bc..f75c0bd 100644
--- a/sys/npc.h
+++ b/sys/npc.h
@@ -57,6 +57,8 @@
 public varargs mixed   GetInfo(string str);
 // aus npc/items.c
 public varargs object  AddItem(mixed filename, int refresh, mixed props);
+// aus npc/chat.c
+void SetAttackChats(int chance, mixed strs);
 #endif // _NPC_H_PROTOTYPES_
 #endif // NEED_PROTOTYPES