diff --git a/Alpha_wrap_3/benchmark/Alpha_wrap_3/Quality/generate_quality_benchmark_charts.py b/Alpha_wrap_3/benchmark/Alpha_wrap_3/Quality/generate_quality_benchmark_charts.py
index 0df5ed5e0f4..264dec30935 100644
--- a/Alpha_wrap_3/benchmark/Alpha_wrap_3/Quality/generate_quality_benchmark_charts.py
+++ b/Alpha_wrap_3/benchmark/Alpha_wrap_3/Quality/generate_quality_benchmark_charts.py
@@ -134,13 +134,13 @@ def main(argv):
       avg_diff_str = str(format(abs(avg_diff_to_goal), '.2f'))
       if key == "Mean_Min_Angle_(degree)" or key == "Mean_Max_Angle_(degree)":
         if avg_diff_to_goal < 0 :
-          title += "\nIn average we loose "
+          title += "\nIn average we lose "
         else :
           title += "\nIn average we gain "
         title += avg_diff_str + "° toward 60°"
       elif key == "Mean_Radius_Ratio" or key == "Mean_Edge_Ratio" or key == "Mean_Aspect_Ratio" :
         if avg_diff_to_goal < 0 :
-          title += "\nIn average we loose "
+          title += "\nIn average we lose "
         else :
           title += "\nIn average we gain "
         title += avg_diff_str + " of ratio toward 1"
diff --git a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/fitness_function.h b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/fitness_function.h
index 2eab0c64061..696ebf615a9 100644
--- a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/fitness_function.h
+++ b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/fitness_function.h
@@ -39,7 +39,7 @@ compute_fitness(const typename Traits::Matrix& R, // rotation matrix
   CGAL_assertion(points.size() >= 3);
 
   FT xmin, ymin, zmin, xmax, ymax, zmax;
-  //cast from double to float looses data, so cast with {} is not allowed
+  //cast from double to float loses data, so cast with {} is not allowed
   //cast from double to exact types also works
   xmin = ymin = zmin = FT((std::numeric_limits<double>::max)());
   xmax = ymax = zmax = FT(std::numeric_limits<double>::lowest());
@@ -83,7 +83,7 @@ compute_fitness_if_smaller(const typename Traits::Matrix& R, // rotation matrix
   CGAL_assertion(points.size() >= 3);
 
   FT xmin, ymin, zmin, xmax, ymax, zmax;
-  //cast from double to float looses data, so cast with {} is not allowed
+  //cast from double to float loses data, so cast with {} is not allowed
   //cast from double to exact types also works
   xmin = ymin = zmin = FT((std::numeric_limits<double>::max)());
   xmax = ymax = zmax = FT(std::numeric_limits<double>::lowest());
diff --git a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/optimize_2.h b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/optimize_2.h
index ae450d781e8..cdcbe384173 100644
--- a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/optimize_2.h
+++ b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/optimize_2.h
@@ -104,7 +104,7 @@ compute_2D_deviation(const PointRange& points,
   if(theta > 0.25 * CGAL_PI) // @todo is there a point to this
     theta = 0.5 * CGAL_PI - theta;
 
-  //cast from double to float looses data, so cast with {} is not allowed
+  //cast from double to float loses data, so cast with {} is not allowed
   //cast from double to exact types also works
   return std::make_pair(pol.area(), FT(theta));
 }
@@ -125,7 +125,7 @@ void optimize_along_OBB_axes(typename Traits::Matrix& rot,
   rotated_points.reserve(points.size());
 
   FT xmin, ymin, zmin, xmax, ymax, zmax;
-  //cast from double to float looses data, so cast with {} is not allowed
+  //cast from double to float loses data, so cast with {} is not allowed
   //cast from double to exact types also works
   xmin = ymin = zmin = FT((std::numeric_limits<double>::max)());
   xmax = ymax = zmax = FT(std::numeric_limits<double>::lowest());
diff --git a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/population.h b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/population.h
index 8223f7afed5..7ed14357ef2 100644
--- a/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/population.h
+++ b/Optimal_bounding_box/include/CGAL/Optimal_bounding_box/internal/population.h
@@ -121,7 +121,7 @@ public:
   Vertex& get_best_vertex()
   {
     std::size_t simplex_id = static_cast<std::size_t>(-1), vertex_id = static_cast<std::size_t>(-1);
-    //cast from double to float looses data, so cast with {} is not allowed
+    //cast from double to float loses data, so cast with {} is not allowed
     //cast from double to exact types also works
     FT best_fitness = FT((std::numeric_limits<double>::max)());
     for(std::size_t i=0, ps=m_simplices.size(); i<ps; ++i)