diff --git a/README.md b/README.md
index cd9ef94..43be54a 100644
--- a/README.md
+++ b/README.md
@@ -355,7 +355,7 @@ Function | Description
 cosine_distance(vector, vector) → double precision | cosine distance
 inner_product(vector, vector) → double precision | inner product
 l2_distance(vector, vector) → double precision | Euclidean distance
-l1_distance(vector, vector) → double precision | Taxicab distance [unreleased]
+l1_distance(vector, vector) → double precision | taxicab distance [unreleased]
 vector_dims(vector) → integer | number of dimensions
 vector_norm(vector) → double precision | Euclidean norm