diff --git a/dumux/material/constants.hh b/dumux/material/constants.hh
index 64b15c4334c3109d7fac746715d2eb2ca6eccdeb..a94a9778cb0bfb6c724cc259fccf7d9870ae436c 100644
--- a/dumux/material/constants.hh
+++ b/dumux/material/constants.hh
@@ -26,6 +26,8 @@
 #ifndef DUMUX_CONSTANTS_HH
 #define DUMUX_CONSTANTS_HH
 
+#include <math.h>
+
 namespace Dumux
 {