diff --git a/src/main/java/net/minecraft/server/management/ServerConfigurationManager.java b/src/main/java/net/minecraft/server/management/ServerConfigurationManager.java
index b61df86..a2ebb5b 100644
--- a/src/main/java/net/minecraft/server/management/ServerConfigurationManager.java
+++ b/src/main/java/net/minecraft/server/management/ServerConfigurationManager.java
@@ -513,6 +513,7 @@
 		worldserver.getPlayerManager().addPlayer(entityplayermp1);
 		worldserver.spawnEntityInWorld(entityplayermp1);
 		this.playerEntityList.add(entityplayermp1);
+		usernameToPlayerMap.put(entityplayermp1.getGameProfile().getName().toLowerCase(), entityplayermp1);
 		entityplayermp1.addSelfToInternalCraftingInventory();
 		entityplayermp1.setHealth(entityplayermp1.getHealth());
 		FMLCommonHandler.instance().firePlayerRespawnEvent(entityplayermp1);