diff --git a/src/char/char.c b/src/char/char.c
index 20d4574915a..99f06774a12 100644
--- a/src/char/char.c
+++ b/src/char/char.c
@@ -50,6 +50,7 @@
 #include "common/HPM.h"
 #include "common/apipackets.h"
 #include "common/cbasetypes.h"
+#include "common/charloginpackets.h"
 #include "common/chunked.h"
 #include "common/conf.h"
 #include "common/console.h"
@@ -5298,10 +5299,11 @@ static int char_send_accounts_tologin_sub(union DBKey key, struct DBData *data,
 {
 	struct online_char_data* character = DB->data2ptr(data);
 	int* i = va_arg(ap, int*);
+	int* accounts = va_arg(ap, int *);
 
 	nullpo_ret(character);
 	if (character->mapserver_connection == OCS_CONNECTED) {
-		WFIFOL(chr->login_fd,8+(*i)*4) = character->account_id;
+		accounts[*i] = character->account_id;
 		(*i)++;
 		return 1;
 	}
@@ -5310,18 +5312,24 @@ static int char_send_accounts_tologin_sub(union DBKey key, struct DBData *data,
 
 static int char_send_accounts_tologin(int tid, int64 tick, int id, intptr_t data)
 {
-	if (chr->login_fd > 0 && sockt->session[chr->login_fd])
-	{
+	if (chr->login_fd > 0 && sockt->session[chr->login_fd] != NULL) {
 		// send account list to login server
 		int users = chr->online_char_db->size(chr->online_char_db);
 		int i = 0;
 
-		WFIFOHEAD(chr->login_fd,8+users*4);
-		WFIFOW(chr->login_fd,0) = 0x272d;
-		chr->online_char_db->foreach(chr->online_char_db, chr->send_accounts_tologin_sub, &i, users);
-		WFIFOW(chr->login_fd,2) = 8+ i*4;
-		WFIFOL(chr->login_fd,4) = i;
-		WFIFOSET(chr->login_fd,WFIFOW(chr->login_fd,2));
+		struct PACKET_CHARLOGIN_ONLINE_ACCOUNTS *p;
+		int len = sizeof(struct PACKET_CHARLOGIN_ONLINE_ACCOUNTS) + sizeof(*p->accounts) * users;
+
+		WFIFOHEAD(chr->login_fd, len);
+		p = WFIFOP(chr->login_fd, 0);
+		p->packetType = HEADER_CHARLOGIN_ONLINE_ACCOUNTS;
+
+		chr->online_char_db->foreach(chr->online_char_db, chr->send_accounts_tologin_sub, &i, p->accounts);
+
+		p->packetLength = sizeof(struct PACKET_CHARLOGIN_ONLINE_ACCOUNTS) + sizeof(*p->accounts) * i;
+		p->list_length = i;
+
+		WFIFOSET(chr->login_fd, len);
 	}
 	return 0;
 }
diff --git a/src/common/Makefile.in b/src/common/Makefile.in
index ed7baebcfa1..136fe456e53 100644
--- a/src/common/Makefile.in
+++ b/src/common/Makefile.in
@@ -62,7 +62,7 @@ COMMON_H = atomic.h cbasetypes.h base62.h conf.h console.h core.h db.h des.h ers
            grfio.h hercules.h HPM.h HPMi.h memmgr.h memmgr_inc.h mapindex.h \
            md5calc.h mmo.h mutex.h nullpo.h packets.h packets_len.h packets_struct.h random.h \
            showmsg.h socket.h spinlock.h sql.h strlib.h sysinfo.h thread.h \
-           timer.h utils.h winapi.h api.h charmappackets.h mapcharpackets.h \
+           timer.h utils.h winapi.h api.h charloginpackets.h charmappackets.h mapcharpackets.h \
            chunked/rfifo.h chunked/wfifo.h config/defc.h config/emblems.h config/undefc.h \
            ../plugins/HPMHooking.h
 COMMON_PH =
diff --git a/src/common/charloginpackets.h b/src/common/charloginpackets.h
new file mode 100644
index 00000000000..bdfda7c7d1f
--- /dev/null
+++ b/src/common/charloginpackets.h
@@ -0,0 +1,45 @@
+/**
+ * This file is part of Hercules.
+ * http://herc.ws - http://github.com/HerculesWS/Hercules
+ *
+ * Copyright (C) 2012-2024 Hercules Dev Team
+ * Copyright (C) Athena Dev Teams
+ *
+ * Hercules is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef COMMON_CHARLOGINPACKETS_H
+#define COMMON_CHARLOGINPACKETS_H
+
+// Packets sent by Char-Server to Login-Server
+
+#include "common/hercules.h"
+
+/* Packets Structs */
+#if !defined(sun) && (!defined(__NETBSD__) || __NetBSD_Version__ >= 600000000) // NetBSD 5 and Solaris don't like pragma pack but accept the packed attribute
+#pragma pack(push, 1)
+#endif // not NetBSD < 6 / Solaris
+
+struct PACKET_CHARLOGIN_ONLINE_ACCOUNTS {
+	int16 packetType;
+	uint16 packetLength;
+	uint32 list_length;
+	int accounts[];
+} __attribute__((packed));
+DEFINE_PACKET_ID(CHARLOGIN_ONLINE_ACCOUNTS, 0x272d)
+
+#if !defined(sun) && (!defined(__NETBSD__) || __NetBSD_Version__ >= 600000000) // NetBSD 5 and Solaris don't like pragma pack but accept the packed attribute
+#pragma pack(pop)
+#endif // not NetBSD < 6 / Solaris
+
+#endif /* COMMON_CHARLOGINPACKETS_H */
diff --git a/src/login/login.c b/src/login/login.c
index 8a4458bd857..20ad72d7d33 100644
--- a/src/login/login.c
+++ b/src/login/login.c
@@ -32,6 +32,7 @@
 #include "common/HPM.h"
 #include "common/apipackets.h"
 #include "common/cbasetypes.h"
+#include "common/charloginpackets.h"
 #include "common/conf.h"
 #include "common/core.h"
 #include "common/db.h"
@@ -675,17 +676,17 @@ static void login_fromchar_parse_account_offline(int fd)
 
 static void login_fromchar_parse_online_accounts(int fd, int id)
 {
-	uint32 i, users;
 	login->online_db->foreach(login->online_db, login->online_db_setoffline, id); //Set all chars from this char-server offline first
-	users = RFIFOW(fd,4);
-	for (i = 0; i < users; i++) {
-		int aid = RFIFOL(fd,6+i*4);
-		struct online_login_data *p = idb_ensure(login->online_db, aid, login->create_online_user);
-		p->char_server = id;
-		if (p->waiting_disconnect != INVALID_TIMER)
-		{
-			timer->delete(p->waiting_disconnect, login->waiting_disconnect_timer);
-			p->waiting_disconnect = INVALID_TIMER;
+
+	const struct PACKET_CHARLOGIN_ONLINE_ACCOUNTS *p = RFIFOP(fd, 0);
+	for (uint32 i = 0; i < p->list_length; i++) {
+		int aid = p->accounts[i];
+		struct online_login_data *login_data = idb_ensure(login->online_db, aid, login->create_online_user);
+		login_data->char_server = id;
+
+		if (login_data->waiting_disconnect != INVALID_TIMER) {
+			timer->delete(login_data->waiting_disconnect, login->waiting_disconnect_timer);
+			login_data->waiting_disconnect = INVALID_TIMER;
 		}
 	}
 }
@@ -950,7 +951,7 @@ static int login_parse_fromchar(int fd)
 			login->fromchar_parse_account_offline(fd);
 		break;
 
-		case 0x272d: // Receive list of all online accounts. [Skotlex]
+		case HEADER_CHARLOGIN_ONLINE_ACCOUNTS: // Receive list of all online accounts. [Skotlex]
 			if (RFIFOREST(fd) < 4 || RFIFOREST(fd) < RFIFOW(fd,2))
 				return 0;
 			{