diff --git a/graphicle/calculate.py b/graphicle/calculate.py
index f57ca6e..abaefb5 100644
--- a/graphicle/calculate.py
+++ b/graphicle/calculate.py
@@ -39,6 +39,7 @@
     "cluster_coeff_distbn",
     "thrust",
     "spherocity",
+    "c_parameter",
     "jaccard_distance",
 ]