diff --git a/jedi/api/classes.py b/jedi/api/classes.py
index a1d42bd0..75275dd2 100644
--- a/jedi/api/classes.py
+++ b/jedi/api/classes.py
@@ -336,7 +336,7 @@ class BaseDefinition(object):
             raise AttributeError()
         followed = followed[0]  # only check the first one.
 
-        if followed.type == 'funcdef':
+        if followed.type in ('funcdef', 'lambda'):
             if isinstance(followed, er.InstanceElement):
                 params = followed.params[1:]
             else: