diff --git a/slicetimer.cc b/slicetimer.cc
index 45937bfbd35791b9ff785e12bf6d79d857eba34a..01e4df9decb9c3d495daf0a9b892137fc7889e19 100644
--- a/slicetimer.cc
+++ b/slicetimer.cc
@@ -7,16 +7,14 @@
 /*  CCOPYRIGHT */
 
 
-#include <math.h>
-#include <iostream.h>
+#include <cmath>
+#include <iostream>
 #include <iomanip>
-#include <fstream.h>
-#include <stdlib.h>
-#include <stdio.h>
+#include <fstream>
+#include <cstdlib>
 #include <string>
 #include <strstream>
-#include <unistd.h>
-#include <vector.h>
+#include <vector>
 
 #include "miscmaths/optimise.h"
 #include "newmatap.h"