diff --git a/code/modules/mob/new_player/new_player.dm b/code/modules/mob/new_player/new_player.dm
index ea27828385..cd9171ab75 100644
--- a/code/modules/mob/new_player/new_player.dm
+++ b/code/modules/mob/new_player/new_player.dm
@@ -169,6 +169,13 @@
 		ViewManifest()
 
 	if(href_list["SelectedJob"])
+	
+		//Prevents people rejoining as same character.
+		for (var/mob/living/carbon/human/C in mob_list)
+			var/char_name = client.prefs.real_name
+			if(char_name == C.real_name)
+				usr << "<span class='notice'>There is a character that already exists with the same name - <b>[C.real_name]</b>, please join with a different one.</span>"
+				return
 
 		if(!config.enter_allowed)
 			usr << "<span class='notice'>There is an administrative lock on entering the game!</span>"