diff --git a/hypervisor/include/lib/util.h b/hypervisor/include/lib/util.h
index 176455a3e..c7e3604d2 100644
--- a/hypervisor/include/lib/util.h
+++ b/hypervisor/include/lib/util.h
@@ -22,6 +22,9 @@
 
 #define max(x, y)	(((x) < (y)) ? (y) : (x))
 
+/** return a value of v clamped to the range [l, h] */
+#define clamp(v, l, h)	(max(min((v), (h)), (l)))
+
 /** Replaces 'x' by the string "x". */
 #define STRINGIFY(x) #x