diff --git a/delaunay.h b/delaunay.h
index afa0846..d5638b7 100644
--- a/delaunay.h
+++ b/delaunay.h
@@ -197,7 +197,7 @@ void make_delaunay(triangle *t)
 					dist = (t->cx - n_vert->x) * (t->cx - n_vert->x) + 
 						(t->cy - n_vert->y) * (t->cy - n_vert->y);
 
-					if ((dist - t->cr) <= ZERO) // need to be flipped
+					if ((dist - t->cr) < -1.0*ZERO) // need to be flipped
 					{
 						flip_neighboring_triangles(t, n_tri, n, v);
 						// Make sure the triangles also meet the empty circumcircle condition after flipping