diff --git a/STL_Extension/include/CGAL/Fourtuple.h b/STL_Extension/include/CGAL/Fourtuple.h
index ca46768b51e..7b15c60ed67 100644
--- a/STL_Extension/include/CGAL/Fourtuple.h
+++ b/STL_Extension/include/CGAL/Fourtuple.h
@@ -33,10 +33,10 @@ struct Fourtuple
 
   T  e0, e1, e2, e3;
 
-  Fourtuple()
+  Fourtuple() CGAL_DEPRECATED
   {}
 
-  Fourtuple(const T & a0, const T & a1, const T & a2, const T & a3)
+  Fourtuple(const T & a0, const T & a1, const T & a2, const T & a3) CGAL_DEPRECATED
     : e0(a0), e1(a1), e2(a2), e3(a3)
   {}
 };
diff --git a/STL_Extension/include/CGAL/Sixtuple.h b/STL_Extension/include/CGAL/Sixtuple.h
index b08a9831f08..b99631016d1 100644
--- a/STL_Extension/include/CGAL/Sixtuple.h
+++ b/STL_Extension/include/CGAL/Sixtuple.h
@@ -33,11 +33,11 @@ struct Sixtuple
 
   T  e0, e1, e2, e3, e4, e5;
 
-  Sixtuple()
+  Sixtuple() CGAL_DEPRECATED
   {}
 
   Sixtuple(const T & a0, const T & a1, const T & a2,
-           const T & a3, const T & a4, const T & a5)
+           const T & a3, const T & a4, const T & a5) CGAL_DEPRECATED
     : e0(a0), e1(a1), e2(a2), e3(a3), e4(a4), e5(a5)
   {}
 };
diff --git a/STL_Extension/include/CGAL/Threetuple.h b/STL_Extension/include/CGAL/Threetuple.h
index b46d7ea2496..bc8f6ade724 100644
--- a/STL_Extension/include/CGAL/Threetuple.h
+++ b/STL_Extension/include/CGAL/Threetuple.h
@@ -33,10 +33,10 @@ struct Threetuple
 
   T  e0, e1, e2;
 
-  Threetuple()
+  Threetuple() CGAL_DEPRECATED
   {}
 
-  Threetuple(const T & a0, const T & a1, const T & a2)
+  Threetuple(const T & a0, const T & a1, const T & a2) CGAL_DEPRECATED
     : e0(a0), e1(a1), e2(a2)
   {}
 };
diff --git a/STL_Extension/include/CGAL/Twotuple.h b/STL_Extension/include/CGAL/Twotuple.h
index 498e3b87ea4..7063d46ac7d 100644
--- a/STL_Extension/include/CGAL/Twotuple.h
+++ b/STL_Extension/include/CGAL/Twotuple.h
@@ -33,10 +33,10 @@ struct Twotuple
 
   T  e0, e1;
 
-  Twotuple()
+  Twotuple() CGAL_DEPRECATED
   {}
 
-  Twotuple(const T & a0, const T &a1) : e0(a0), e1(a1)
+  Twotuple(const T & a0, const T &a1) CGAL_DEPRECATED : e0(a0), e1(a1)
   {}
 };