diff --git a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_circles_2.h b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_circles_2.h
index c0698acc85f..d6abf3d1482 100644
--- a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_circles_2.h
+++ b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_circles_2.h
@@ -135,7 +135,7 @@ linear_least_squares_fitting_2(InputIterator first,
     // isotropic case (infinite number of directions)
     // by default: assemble a line that goes through
     // the centroid and with a default horizontal vector.
-    line = Line(c, Vector(1.0, 0.0));
+    line = Line(c, Vector(FT(1), FT(0)));
     return (FT)0.0;
   }
 
diff --git a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_rectangles_2.h b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_rectangles_2.h
index 7fec0fea638..3bec5e8d4d5 100644
--- a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_rectangles_2.h
+++ b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_rectangles_2.h
@@ -139,7 +139,7 @@ linear_least_squares_fitting_2(InputIterator first,
     // isotropic case (infinite number of directions)
     // by default: assemble a line that goes through
     // the centroid and with a default horizontal vector.
-    line = Line(c, Vector(1.0, 0.0));
+    line = Line(c, Vector(FT(1), FT(0)));
     return (FT)0.0;
   }
 } // end linear_least_squares_fitting_2 for rectangle set with 2D tag
diff --git a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_triangles_2.h b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_triangles_2.h
index 61857a079e8..ab96ad6d408 100644
--- a/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_triangles_2.h
+++ b/Principal_component_analysis/include/CGAL/linear_least_squares_fitting_triangles_2.h
@@ -138,7 +138,7 @@ linear_least_squares_fitting_2(InputIterator first,
     // isotropic case (infinite number of directions)
     // by default: assemble a line that goes through
     // the centroid and with a default horizontal vector.
-    line = Line(c, Vector(1.0, 0.0));
+    line = Line(c, Vector(FT(1), FT(0)));
     return (FT)0.0;
   }
 } // end linear_least_squares_fitting_2 for triangle set with 2D tag