diff --git a/Heat_method_3/include/CGAL/Heat_method_3/Intrinsic_Delaunay_triangulation_3.h b/Heat_method_3/include/CGAL/Heat_method_3/Intrinsic_Delaunay_triangulation_3.h
index e62ddaeed7d..798efeab055 100644
--- a/Heat_method_3/include/CGAL/Heat_method_3/Intrinsic_Delaunay_triangulation_3.h
+++ b/Heat_method_3/include/CGAL/Heat_method_3/Intrinsic_Delaunay_triangulation_3.h
@@ -43,8 +43,6 @@
 
 #include <set>
 #include <stack>
-#include <fstream>
-#include <array>
 #include <cmath>
 
 #ifndef DOXYGEN_RUNNING