diff --git a/src/pyelephant.py b/src/pyelephant.py
index e9732ad..4369b81 100755
--- a/src/pyelephant.py
+++ b/src/pyelephant.py
@@ -18,7 +18,7 @@ def add(session: sa.orm.Session, title: str):
 
 # -----------------------------------------------------------------------------
 def rm(session: sa.orm.Session, index: int):
-    session.query(Task.id == index).delete()
+    session.query(Task).filter(Task.id == index).delete()
     session.commit()
 
 
@@ -29,8 +29,8 @@ def show_by_obj(session: sa.orm.Session, obj: Task):
 
 # -----------------------------------------------------------------------------
 def show_by_id(session: sa.orm.Session, index: int):
-    obj = session.query(Task.id == index)
-    show_by_obj(obj)
+    obj = session.query(Task).filter(Task.id == index).one()
+    show_by_obj(session, obj)
 
 
 # -----------------------------------------------------------------------------