diff --git a/pychord/constants/qualities.py b/pychord/constants/qualities.py
index f32b9e8..94ae1c6 100644
--- a/pychord/constants/qualities.py
+++ b/pychord/constants/qualities.py
@@ -63,6 +63,7 @@
     ('9sus4', (0, 5, 7, 10, 14)),
     ('7-9', (0, 4, 7, 10, 13)),
     ('7b9', (0, 4, 7, 10, 13)),
+    ('7(b9)', (0, 4, 7, 10, 13)),   # https://www.oolimo.com/guitarchords/Fsharp7(b9)
     ('7+9', (0, 4, 7, 10, 15)),
     ('7#9', (0, 4, 7, 10, 15)),
     ('9-5', (0, 4, 6, 10, 14)),