diff --git a/README b/README
index 1d5182825241f42e8c8256daf1f7c88aec2c90ec..57010161f57f5a719430b06a64b75fd27980b16d 100644
--- a/README
+++ b/README
@@ -496,6 +496,13 @@ The following options need to be configured:
 		exists, unlike the similar options in the Linux kernel. Do not
 		set these options unless they apply!
 
+- CPU timer options:
+		CONFIG_SYS_HZ
+
+		The frequency of the timer returned by get_timer().
+		get_timer() must operate in milliseconds and this CONFIG
+		option must be set to 1000.
+
 - Linux Kernel Interface:
 		CONFIG_CLOCKS_IN_MHZ