diff --git a/STL_Extension/test/STL_Extension/test_Modifiable_priority_queue.cpp b/STL_Extension/test/STL_Extension/test_Modifiable_priority_queue.cpp
index 9530c12e624..3c5105ff482 100644
--- a/STL_Extension/test/STL_Extension/test_Modifiable_priority_queue.cpp
+++ b/STL_Extension/test/STL_Extension/test_Modifiable_priority_queue.cpp
@@ -1,4 +1,4 @@
-#include <CGAL/Cartesian.h>
+#include <CGAL/assertions.h>
 #include <CGAL/Modifiable_priority_queue.h>
 #include <iostream>
 #include <functional>