diff --git a/Boolean_set_operations_2/Boolean_set_operations.dxy b/Boolean_set_operations_2/Boolean_set_operations.dxy
index 76a7c0ed5f5..705df357d38 100644
--- a/Boolean_set_operations_2/Boolean_set_operations.dxy
+++ b/Boolean_set_operations_2/Boolean_set_operations.dxy
@@ -450,7 +450,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories 
 # with spaces.
 
-INPUT                  = include/CGAL
+INPUT                  = include/CGAL examples/Boolean_set_operations_2
 
 # If the value of the INPUT tag contains directories, you can use the 
 # FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp