diff --git a/Source/Network/Packets/PartyJoinPacket.h b/Source/Network/Packets/PartyJoinPacket.h
index ebce2fa12..330991bde 100644
--- a/Source/Network/Packets/PartyJoinPacket.h
+++ b/Source/Network/Packets/PartyJoinPacket.h
@@ -15,7 +15,7 @@ class PacketLengths;
 
 void SendPartyJoin(CConnection& connection, const PacketLengths& lengths, const std::uint32_t* accountId, const std::uint32_t* characterId);
 void SendPartyJoinDecision(CConnection& connection, const PacketLengths& lengths, std::uint32_t characterId, bool accepted, const std::uint32_t* accountId);
-void ReceivePartyJoinRequest(const void* packet);
+void __stdcall ReceivePartyJoinRequest(const void* packet);
 void SendPartyInvitationDecision(
   CConnection& connection, const PacketLengths& lengths, WindowManagerWindows& windows, std::string& pendingName, std::uint32_t identity, bool accepted
 );
diff --git a/Source/Network/Packets/PartyJoinRequest.cpp b/Source/Network/Packets/PartyJoinRequest.cpp
index 65a60fe18..ac471a52b 100644
--- a/Source/Network/Packets/PartyJoinRequest.cpp
+++ b/Source/Network/Packets/PartyJoinRequest.cpp
@@ -5,7 +5,7 @@
 
 // OFFSET: 0x00D3BCE0
 // FUNCTION: fn_21789
-void ReceivePartyJoinRequest(const void* packet) {
+void __stdcall ReceivePartyJoinRequest(const void* packet) {
   const auto* bytes = static_cast<const unsigned char*>(packet);
   char name[25];
   std::strncpy(name, reinterpret_cast<const char*>(bytes + 10), 24);