diff --git a/ntrfc/turbo/profile_tele_extraction.py b/ntrfc/turbo/profile_tele_extraction.py
index 38921f6924d076bfb7ae700935599ef8b5eaf9bc..9d13408af8a0141d3f6c48c6129974d203779be9 100644
--- a/ntrfc/turbo/profile_tele_extraction.py
+++ b/ntrfc/turbo/profile_tele_extraction.py
@@ -151,7 +151,7 @@ def delaunay_calc(SS_y, DS_y, x_interp, para_filt):
     tri = Delaunay(points.T)
 
     # center of circle around triangle
-    tri1 = tri.points[tri.vertices]
+    tri1 = tri.points[tri.simplices]
     tri_mid = np.zeros([len(tri1), 2])
     for i in range(len(tri1)):
         tri_mid1 = circumcenter(tri1[i, :, 0], tri1[i, :, 1])