6 files changed, 43 insertions, 0 deletions
diff --git a/src/net/eathena/inventoryhandler.cpp b/src/net/eathena/inventoryhandler.cpp
index 0cc248936..b9391bd31 100644
--- a/src/net/eathena/inventoryhandler.cpp
+++ b/src/net/eathena/inventoryhandler.cpp
@@ -38,6 +38,9 @@
 #include "debug.h"
 
 extern int packetVersion;
+extern int packetVersionMain;
+extern int packetVersionRe;
+extern int packetVersionZero;
 extern int serverVersion;
 
 // this conversion from bit corrupted LOOK_* to EquipSlot
@@ -600,4 +603,15 @@ void InventoryHandler::mergetItemsCancel() const
     createOutPacket(CMSG_MERGE_ITEM_CANCEL);
 }
 
+void InventoryHandler::expandInventory() const
+{
+    if (packetVersionMain < 20181031 &&
+        packetVersionRe < 20181031 &&
+        packetVersionZero < 20181114)
+    {
+        return;
+    }
+    createOutPacket(CMSG_INVENTORY_EXPAND);
+}
+
 }  // namespace EAthena
diff --git a/src/net/eathena/inventoryhandler.h b/src/net/eathena/inventoryhandler.h
index 5da0262e0..179402a39 100644
--- a/src/net/eathena/inventoryhandler.h
+++ b/src/net/eathena/inventoryhandler.h
@@ -82,6 +82,8 @@ class InventoryHandler final : public Ea::InventoryHandler
 
         void mergetItemsCancel() const override final;
 
+        void expandInventory() const override final;
+
         int getProjectileSlot() const override final
         { return 10; }
 
diff --git a/src/net/eathena/packetsout.inc b/src/net/eathena/packetsout.inc
index b1a41e4d2..7ba401f84 100644
--- a/src/net/eathena/packetsout.inc
+++ b/src/net/eathena/packetsout.inc
@@ -344,6 +344,7 @@ packet(CMSG_INSTANCE_COMMAND,             0x0000,   0, nullptr);
 packet(CMSG_ACHIEVEMENT_GET_REWARD,       0x0000,   0, nullptr);
 packet(CMSG_LOGIN_MOBILE_OTP,             0x0000,   0, nullptr);
 packet(CMSG_LOGIN_OTP_CODE,               0x0000,   0, nullptr);
+packet(CMSG_INVENTORY_EXPAND,             0x0000,   0, nullptr);
 #else
 // 20040713
 if (packetVersion >= 20040713)
@@ -1464,6 +1465,18 @@ if (packetVersionRe >= 20180718)
     packet(CMSG_PLAYER_SELECT_STYLE,      0x0afc,  16, clif->pReqStyleChange);
 }
 
+// 20181031 main
+if (packetVersionMain >= 20181031)
+{
+    packet(CMSG_INVENTORY_EXPAND,         0x0b14,   2, clif->pInventoryExpansion);
+}
+
+// 20181031 re
+if (packetVersionRe >= 20181031)
+{
+    packet(CMSG_INVENTORY_EXPAND,         0x0b14,   2, clif->pInventoryExpansion);
+}
+
 // 20181114 main
 if (packetVersionMain >= 20181114)
 {
@@ -1478,4 +1491,10 @@ if (packetVersionRe >= 20181114)
     packet(CMSG_LOGIN_OTP_CODE,           0x0ad0,  11, lclif->p->parse_CA_OTP_CODE);
 }
 
+// 20181114 zero
+if (packetVersionZero >= 20181114)
+{
+    packet(CMSG_INVENTORY_EXPAND,         0x0b14,   2, clif->pInventoryExpansion);
+}
+
 #endif
diff --git a/src/net/inventoryhandler.h b/src/net/inventoryhandler.h
index 85e819648..18e4d3eed 100644
--- a/src/net/inventoryhandler.h
+++ b/src/net/inventoryhandler.h
@@ -105,6 +105,8 @@ class InventoryHandler notfinal
         virtual void mergeItemsAck(const STD_VECTOR<Item*> &items) const = 0;
 
         virtual void mergetItemsCancel() const = 0;
+
+        virtual void expandInventory() const = 0;
 };
 
 }  // namespace Net
diff --git a/src/net/tmwa/inventoryhandler.cpp b/src/net/tmwa/inventoryhandler.cpp
index 0c2b56e9e..ee60e399c 100644
--- a/src/net/tmwa/inventoryhandler.cpp
+++ b/src/net/tmwa/inventoryhandler.cpp
@@ -193,4 +193,8 @@ void InventoryHandler::mergetItemsCancel() const
 {
 }
 
+void InventoryHandler::expandInventory() const
+{
+}
+
 }  // namespace TmwAthena
diff --git a/src/net/tmwa/inventoryhandler.h b/src/net/tmwa/inventoryhandler.h
index 5d1a54d7f..a7e5a4b30 100644
--- a/src/net/tmwa/inventoryhandler.h
+++ b/src/net/tmwa/inventoryhandler.h
@@ -79,6 +79,8 @@ class InventoryHandler final : public Ea::InventoryHandler
 
         void mergetItemsCancel() const override final;
 
+        void expandInventory() const override final;
+
         int getProjectileSlot() const override final
         { return 10; }