diff --git a/NewKernel_d/include/CGAL/NewKernel_d/orientationC4.h b/NewKernel_d/include/CGAL/NewKernel_d/orientationC4.h
new file mode 100644
index 00000000000..0a12b57b258
--- /dev/null
+++ b/NewKernel_d/include/CGAL/NewKernel_d/orientationC4.h
@@ -0,0 +1,62 @@
+
+
+
+inline int orientationC4(double p0, double p1, double p2, double p3,
+                         double q0, double q1, double q2, double q3,
+                         double r0, double r1, double r2, double r3,
+                         double s0, double s1, double s2, double s3,
+                         double t0, double t1, double t2, double t3)
+{
+
+    double m01;
+    m01 = (q0 - p0);
+    double m02;
+    m02 = (r0 - p0);
+    double m03;
+    m03 = (s0 - p0);
+    double m04;
+    m04 = (t0 - p0);
+
+    double m11;
+    m01 = (q1 - p1);
+    double m12;
+    m02 = (r1 - p1);
+    double m13;
+    m03 = (s1 - p1);
+    double m14;
+    m04 = (t1 - p1);
+
+    double m21;
+    m01 = (q2 - p2);
+    double m22;
+    m02 = (r2 - p2);
+    double m23;
+    m03 = (s2 - p2);
+    double m24;
+    m04 = (t2 - p2);
+
+    double m31;
+    m01 = (q3 - p3);
+    double m32;
+    m02 = (r3 - p3);
+    double m33;
+    m03 = (s3 - p3);
+    double m34;
+    m04 = (t3 - p3);
+
+    double det = determinant(m01, m02, m03, m04,
+                             m11, m12, m13, m14,
+                             m21, m22, m23, m24,
+                             m31, m32, m33, m34);
+    if (det > 0) {
+        return 1; // positive orientation
+    } else if (det < 0) {
+        return -1; // negative orientation
+    } else {
+        return 0; // zero orientation
+    }
+
+}
+
+
+