diff --git a/Shape_detection/doc/Shape_detection/Concepts/EfficientRANSACTraits.h b/Shape_detection/doc/Shape_detection/Concepts/EfficientRANSACTraits.h
index 791a6af649b..867a55fec70 100644
--- a/Shape_detection/doc/Shape_detection/Concepts/EfficientRANSACTraits.h
+++ b/Shape_detection/doc/Shape_detection/Concepts/EfficientRANSACTraits.h
@@ -38,7 +38,7 @@ public:
   /// The circle type, only required if you want to detect tori
   typedef unspecified_type Circle_2;
   /// The 2D vector type, only required if you want to detect tori
-  typedef unspecified_type Vector_3;
+  typedef unspecified_type Vector_2;
 
   /// The number type of the Cartesian coordinates of types Point_3
   typedef unspecified_type FT;