diff --git a/ziffers/defaults.py b/ziffers/defaults.py
index 5bd8867..eb34e56 100644
--- a/ziffers/defaults.py
+++ b/ziffers/defaults.py
@@ -1700,6 +1700,7 @@ def __build_chords():
         "madd11": [0, 3, 7, 17],
         "madd13": [0, 3, 7, 21],
         "dim9": [0, 3, 6, 9, 14],
+        "dim": dim,
         "hdim7": halfdim,
         "hdim9": [0, 3, 6, 10, 14],
         "hdimb9": [0, 3, 6, 10, 13],