diff --git a/sunkit_image/asda.py b/sunkit_image/asda.py
index a1e1a380..9dcc173c 100644
--- a/sunkit_image/asda.py
+++ b/sunkit_image/asda.py
@@ -23,7 +23,7 @@
 ]
 
 
-def gen_vel(vx, vy, i, j, r=3):
+def generate_velocity_field(vx, vy, i, j, r=3):
     """
     Given a point ``[i, j]``, generate a velocity field which contains a region
     with a size of ``(2r+1) x (2r+1)`` centered at ``[i, j]`` from the original