diff --git a/Classification/examples/Classification/example_cluster_classification.cpp b/Classification/examples/Classification/example_cluster_classification.cpp
index f1728fd6837..c635e32dc31 100644
--- a/Classification/examples/Classification/example_cluster_classification.cpp
+++ b/Classification/examples/Classification/example_cluster_classification.cpp
@@ -56,7 +56,7 @@ int main (int argc, char** argv)
   if (argc > 2)
     filename_config = argv[2];
 
-    std::cerr << "Reading input" << std::endl;
+  std::cerr << "Reading input" << std::endl;
   Point_set pts;
   if(!(CGAL::read_point_set(filename, pts,
                             // the PLY reader expects a binary file by default