diff --git a/Solver_interface/include/CGAL/Mixed_integer_program_traits.h b/Solver_interface/include/CGAL/Mixed_integer_program_traits.h
index 777e659c80c..f1b9b74e893 100644
--- a/Solver_interface/include/CGAL/Mixed_integer_program_traits.h
+++ b/Solver_interface/include/CGAL/Mixed_integer_program_traits.h
@@ -26,6 +26,7 @@
 #include <iostream>
 #include <iomanip>
 #include <sstream>
+#include <cmath>
 
 namespace CGAL {