diff --git a/src/util/numeric.cpp b/src/util/numeric.cpp
index 0e2772c32..67df4ffba 100644
--- a/src/util/numeric.cpp
+++ b/src/util/numeric.cpp
@@ -18,6 +18,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include "numeric.h"
+#include "mathconstants.h"
 
 #include "../log.h"
 #include "../constants.h" // BS, MAP_BLOCKSIZE