diff --git a/mingus/core/chords.py b/mingus/core/chords.py
index 7415b30..b4079b0 100644
--- a/mingus/core/chords.py
+++ b/mingus/core/chords.py
@@ -756,7 +756,7 @@ def VII(key):
 
 
 def vii7(key):
-    return subtonic(key)
+    return subtonic7(key)
 
 
 def VII7(key):