diff --git a/Number_types/include/CGAL/double.h b/Number_types/include/CGAL/double.h
index 3ec5bd8a6d3..179d37dbe54 100644
--- a/Number_types/include/CGAL/double.h
+++ b/Number_types/include/CGAL/double.h
@@ -27,6 +27,7 @@
 #include <CGAL/basic.h>
 #include <utility>
 #include <cmath>
+#include <math.h> // for nextafter
 #include <limits>
 
 #ifdef _MSC_VER