diff --git a/src/util/rounding.h b/src/util/rounding.h
index 7b5608b..c13f3da 100644
--- a/src/util/rounding.h
+++ b/src/util/rounding.h
@@ -27,6 +27,7 @@
 #include "c99_compat.h" // inline
 
 #include <math.h>
+#define __STDC_LIMIT_MACROS
 #include <limits.h>
 #include <stdint.h>