diff --git a/tinydb/database.py b/tinydb/database.py
index <HASH>..<HASH> 100644
--- a/tinydb/database.py
+++ b/tinydb/database.py
@@ -37,7 +37,7 @@ def _get_doc_id(doc_id, eid):
         if doc_id is not None:
             raise TypeError('cannot pass both eid and doc_id')
 
-        warnings.warn('eid has been renamed to doc_ids', DeprecationWarning)
+        warnings.warn('eid has been renamed to doc_id', DeprecationWarning)
         return eid
     else:
         return doc_id
Chore: Fix typo in warning, should be singular (#<I>)