diff --git a/loginserver/client.cpp b/loginserver/client.cpp
index 443eaaa5e..cccd96d03 100644
--- a/loginserver/client.cpp
+++ b/loginserver/client.cpp
@@ -232,7 +232,7 @@ void Client::Handle_Login(const char* data, unsigned int size)
 					result = true;
 				}
 				else {
-					Log.OutF(Logs::General, Logs::Error, "Error logging in, user %s does not exist in the database.", user);
+					Log.OutF(Logs::General, Logs::Error, "Error logging in, user {0} does not exist in the database.", user);
 					result = false;
 				}
 			}
diff --git a/loginserver/database_mysql.cpp b/loginserver/database_mysql.cpp
index d2e0628cb..ed392b9f7 100644
--- a/loginserver/database_mysql.cpp
+++ b/loginserver/database_mysql.cpp
@@ -76,7 +76,7 @@ bool DatabaseMySQL::GetLoginDataFromAccountName(std::string name, std::string &p
 
 	if (mysql_query(database, query.str().c_str()) != 0)
 	{
-		Log.Out(Logs::General, Logs::Error, "Mysql query failed: %s", query.str().c_str());
+		Log.OutF(Logs::General, Logs::Error, "Mysql query failed: {0}", query.str());
 		return false;
 	}