diff --git a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2.h b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2.h
index 1ed7fdba9e3..0a14b8285bc 100644
--- a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2.h
+++ b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2.h
@@ -23,6 +23,9 @@
 #ifndef CGAL_APOLLONIUS_GRAPH_2_H
 #define CGAL_APOLLONIUS_GRAPH_2_H
 
+#define CGAL_APOLLONIUS_GRAPH_IS_HIDDEN_THREE_ARGUMENTS 1
+
+
 #include <iostream>
 #include <vector>
 #include <map>
diff --git a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Is_hidden_C2.h b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Is_hidden_C2.h
index faf7641f22d..ed4bc028485 100644
--- a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Is_hidden_C2.h
+++ b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Is_hidden_C2.h
@@ -23,7 +23,6 @@
 #ifndef CGAL_APOLLONIUS_GRAPH_2_IS_HIDDEN_C2_H
 #define CGAL_APOLLONIUS_GRAPH_2_IS_HIDDEN_C2_H
 
-#define CGAL_APOLLONIUS_GRAPH_IS_HIDDEN_THREE_ARGUMENTS 1
 
 #include <CGAL/Apollonius_graph_2/basic.h>