diff --git a/Packages/Stream_support/demo/Stream_support_LEDA/Istream_iterator.C b/Packages/Stream_support/demo/Stream_support_LEDA/Istream_iterator.C
index b2e671b6f92..0c1dfb869cb 100644
--- a/Packages/Stream_support/demo/Stream_support_LEDA/Istream_iterator.C
+++ b/Packages/Stream_support/demo/Stream_support_LEDA/Istream_iterator.C
@@ -1,3 +1,8 @@
+#ifndef CGAL_USE_LEDA
+#include <iostream>
+int main(){ std::cout << "This demo needs LEDA" << std::endl; return 0;}
+#else
+
 #include <CGAL/Cartesian.h>
 #include <CGAL/IO/Istream_iterator.h>
 #include <CGAL/IO/Window_stream.h>
@@ -26,3 +31,5 @@ int main () {
                std::ostream_iterator<Point>(std::cout,"\n"));
     return 0;
 }
+
+#endif
diff --git a/Packages/Stream_support/demo/Stream_support_LEDA/stream_iterator.C b/Packages/Stream_support/demo/Stream_support_LEDA/stream_iterator.C
index 28e59f04bd2..d2d1326cc52 100644
--- a/Packages/Stream_support/demo/Stream_support_LEDA/stream_iterator.C
+++ b/Packages/Stream_support/demo/Stream_support_LEDA/stream_iterator.C
@@ -1,3 +1,9 @@
+#ifndef CGAL_USE_LEDA
+#include <iostream>
+int main(){ std::cout << "This demo needs LEDA" << std::endl; return 0;}
+#else
+
+
 // stream_iterator.C
 // ----------------------------------------------------------
 // CGAL example program for the CGAL stream iterator adaptor.
@@ -49,3 +55,5 @@ int main() {
 
     return 0;
 }
+
+#endif