diff --git a/scripts/startup/bl_operators/anim.py b/scripts/startup/bl_operators/anim.py
index 3e6f77a354e..44ce27ecf96 100644
--- a/scripts/startup/bl_operators/anim.py
+++ b/scripts/startup/bl_operators/anim.py
@@ -691,6 +691,9 @@ class ANIM_OT_slot_new_for_id(Operator):
         if not animated_id.animation_data.action.is_action_layered:
             cls.poll_message_set("Action slots are only supported by layered Actions. Upgrade this Action first")
             return False
+        if not animated_id.animation_data.action.is_editable:
+            cls.poll_message_set("Creating a new Slot is not possible on a linked Action")
+            return False
         return True
 
     def execute(self, context):