diff --git a/libraries/AC_Avoidance/AC_Avoid.cpp b/libraries/AC_Avoidance/AC_Avoid.cpp
index 18cdb88b7a..6b28fc0415 100644
--- a/libraries/AC_Avoidance/AC_Avoid.cpp
+++ b/libraries/AC_Avoidance/AC_Avoid.cpp
@@ -399,7 +399,7 @@ void AC_Avoid::adjust_velocity_polygon_fence(float kP, float accel_cmss, Vector2
 
     // get polygon boundary
     uint16_t num_points;
-    const Vector2f* boundary = _fence.get_boundary_points(num_points);
+    const Vector2f* boundary = _fence.polyfence().get_boundary_points(num_points);
 
     // adjust velocity using polygon
     adjust_velocity_polygon(kP, accel_cmss, desired_vel_cms, boundary, num_points, true, _fence.get_margin(), dt);