diff --git a/jedi/api.py b/jedi/api.py
index 4734e2f4..126a1620 100644
--- a/jedi/api.py
+++ b/jedi/api.py
@@ -157,7 +157,7 @@ class Script(object):
                     new = api_classes.Completion(c, needs_dot,
                                                     len(like), s)
                     k = (new.word, new.complete)  # key
-                    if k in comp_dct and not settings.no_completion_duplicates:
+                    if k in comp_dct and settings.no_completion_duplicates:
                         comp_dct[k].same_name_completions.append(new)
                     else:
                         comp_dct[k] = new
diff --git a/jedi/settings.py b/jedi/settings.py
index d9ffa24b..b976d866 100644
--- a/jedi/settings.py
+++ b/jedi/settings.py
@@ -16,7 +16,7 @@ add_bracket_after_function = False
 
 # If set, completions with the same name don't appear in the output anymore,
 # but are in the `same_name_completions` attribute.
-no_completion_duplicates = False
+no_completion_duplicates = True
 
 # ----------------
 # parser