diff --git a/code/modules/tgui_input/alert.dm b/code/modules/tgui_input/alert.dm
index 4dc197a3c8c..0ea9c45d310 100644
--- a/code/modules/tgui_input/alert.dm
+++ b/code/modules/tgui_input/alert.dm
@@ -18,7 +18,11 @@
 			var/client/client = user
 			user = client.mob
 		else
-			return
+			return null
+
+	if(isnull(user.client))
+		return null
+
 	// A gentle nudge - you should not be using TGUI alert for anything other than a simple message.
 	if(length(buttons) > 3)
 		log_tgui(user, "Error: TGUI Alert initiated with too many buttons. Use a list.", "TguiAlert")
diff --git a/code/modules/tgui_input/checkboxes.dm b/code/modules/tgui_input/checkboxes.dm
index ec43bd8914d..9204e67ba36 100644
--- a/code/modules/tgui_input/checkboxes.dm
+++ b/code/modules/tgui_input/checkboxes.dm
@@ -14,13 +14,17 @@
 	if (!user)
 		user = usr
 	if(!length(items))
-		return
+		return null
 	if (!istype(user))
 		if (istype(user, /client))
 			var/client/client = user
 			user = client.mob
 		else
-			return
+			return null
+
+	if(isnull(user.client))
+		return null
+
 	if(!user.client.prefs.read_preference(/datum/preference/toggle/tgui_input))
 		return input(user, message, title) as null|anything in items
 	var/datum/tgui_checkbox_input/input = new(user, message, title, items, min_checked, max_checked, timeout, ui_state)
diff --git a/code/modules/tgui_input/list.dm b/code/modules/tgui_input/list.dm
index 95daaadb326..a58b96b06e3 100644
--- a/code/modules/tgui_input/list.dm
+++ b/code/modules/tgui_input/list.dm
@@ -14,13 +14,17 @@
 	if (!user)
 		user = usr
 	if(!length(items))
-		return
+		return null
 	if (!istype(user))
 		if (istype(user, /client))
 			var/client/client = user
 			user = client.mob
 		else
-			return
+			return null
+
+	if(isnull(user.client))
+		return null
+
 	/// Client does NOT have tgui_input on: Returns regular input
 	if(!user.client.prefs.read_preference(/datum/preference/toggle/tgui_input))
 		return input(user, message, title, default) as null|anything in items
diff --git a/code/modules/tgui_input/number.dm b/code/modules/tgui_input/number.dm
index bcdf495fd82..e0a3f1951e5 100644
--- a/code/modules/tgui_input/number.dm
+++ b/code/modules/tgui_input/number.dm
@@ -23,7 +23,11 @@
 			var/client/client = user
 			user = client.mob
 		else
-			return
+			return null
+
+	if (isnull(user.client))
+		return null
+
 	// Client does NOT have tgui_input on: Returns regular input
 	if(!user.client.prefs.read_preference(/datum/preference/toggle/tgui_input))
 		var/input_number = input(user, message, title, default) as null|num
diff --git a/code/modules/tgui_input/text.dm b/code/modules/tgui_input/text.dm
index 811673a4c03..f78ededab5d 100644
--- a/code/modules/tgui_input/text.dm
+++ b/code/modules/tgui_input/text.dm
@@ -23,7 +23,11 @@
 			var/client/client = user
 			user = client.mob
 		else
-			return
+			return null
+
+	if(isnull(user.client))
+		return null
+
 	// Client does NOT have tgui_input on: Returns regular input
 	if(!user.client.prefs.read_preference(/datum/preference/toggle/tgui_input))
 		if(encode)