diff --git a/src/common/Network/PacketDef/Ipcs.h b/src/common/Network/PacketDef/Ipcs.h
index e1f379ca..c06c962b 100644
--- a/src/common/Network/PacketDef/Ipcs.h
+++ b/src/common/Network/PacketDef/Ipcs.h
@@ -372,7 +372,7 @@ namespace Sapphire::Network::Packets
 
     SetSharedEstateSettings = 0x017B, // updated 5.0
 
-    UpdatePositionInstance = 0x0180, // updated 5.0
+    UpdatePositionInstance = 0x0080, // updated 5.21 hotfix
 
     PerformNoteHandler = 0x029B, // updated 4.3
 
diff --git a/src/common/Network/PacketDef/Zone/ClientZoneDef.h b/src/common/Network/PacketDef/Zone/ClientZoneDef.h
index d486ee42..bf698237 100644
--- a/src/common/Network/PacketDef/Zone/ClientZoneDef.h
+++ b/src/common/Network/PacketDef/Zone/ClientZoneDef.h
@@ -56,6 +56,17 @@ struct FFXIVIpcUpdatePosition :
   /* 0008 */ Common::FFXIVARR_POSITION3 position;
   /* 000C */ uint8_t unk[ 4 ]; // padding?
 };
+  
+  struct FFXIVIpcUpdatePositionInstance :
+  FFXIVIpcBasePacket< UpdatePositionInstance >
+{
+  /* 0000 */ float rotation;
+  /* 0004 */ float interpolateRotation;
+  /* 0008 */ uint32_t flags;
+  /* 000C */ Common::FFXIVARR_POSITION3 position;
+  /* 0018 */ Common::FFXIVARR_POSITION3 interpolatePosition;
+  /* 0024 */ uint32_t unknown;
+};
 
 
 struct FFXIVIpcSkillHandler :