diff --git a/include/sys/param.h b/include/sys/param.h
index 5d29d3ce34..4e94f51bbc 100644
--- a/include/sys/param.h
+++ b/include/sys/param.h
@@ -33,6 +33,16 @@
 
 #define MAXHOSTNAMELEN HOST_NAME_MAX
 
+/* Macros for min/max. */
+
+#ifndef MIN
+#  define MIN(a,b)      (((a) < (b)) ? (a) : (b))
+#endif  /* MIN */
+
+#ifndef MAX
+#  define MAX(a,b)      (((a) > (b)) ? (a) : (b))
+#endif  /* MAX */
+
 /****************************************************************************
  * Public Type Definitions
  ****************************************************************************/