diff --git a/README.md b/README.md
index 03dbb642..a4de85a2 100644
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+++ b/README.md
@@ -100,6 +100,11 @@ count.
 
 Wrappers can generated with axis_mux_wrap.py.
 
+### axis_pipeline_register module
+
+Parametrizable register pipeline.  LENGTH parameter determines number of
+register stages.
+
 ### axis_rate_limit module
 
 Fractional rate limiter, supports word and frame modes.  Inserts wait states