diff --git a/libraries/AP_Beacon/AP_Beacon.cpp b/libraries/AP_Beacon/AP_Beacon.cpp
index 0e758e6521..654a2cacc8 100644
--- a/libraries/AP_Beacon/AP_Beacon.cpp
+++ b/libraries/AP_Beacon/AP_Beacon.cpp
@@ -365,7 +365,7 @@ const Vector2f* AP_Beacon::get_boundary_points(uint16_t& num_points) const
         return nullptr;
     }
 
-    num_points = boundary_num_points + 1;
+    num_points = boundary_num_points;
     return boundary;
 }