diff --git a/src/combat_ai.cc b/src/combat_ai.cc
index 3ee2082..2cf475e 100644
--- a/src/combat_ai.cc
+++ b/src/combat_ai.cc
@@ -701,6 +701,12 @@ static int aiPacketWrite(File* stream, AiPacket* ai)
     return 0;
 }
 
+// 0x428058
+int combat_ai_num()
+{
+    return gAiPacketsLength;
+}
+
 // Get ai from object
 //
 // 0x4280B4
diff --git a/src/combat_ai.h b/src/combat_ai.h
index 12cf21d..e182a2c 100644
--- a/src/combat_ai.h
+++ b/src/combat_ai.h
@@ -30,6 +30,7 @@ void aiReset();
 int aiExit();
 int aiLoad(File* stream);
 int aiSave(File* stream);
+int combat_ai_num();
 int aiGetAreaAttackMode(Object* obj);
 int aiGetRunAwayMode(Object* obj);
 int aiGetBestWeapon(Object* obj);