diff --git a/RPC-INTERFACE.rst b/RPC-INTERFACE.rst
index 195fbf0..5705134 100644
--- a/RPC-INTERFACE.rst
+++ b/RPC-INTERFACE.rst
@@ -142,3 +142,8 @@ The following commands are available:
   Returns a list of peer electrum servers.  This command takes no arguments.
 
   Currently this is data gleaned from an IRC session.
+
+* **reorg**
+
+  Force a block chain reorg.  This command takes an optional
+  argument - the number of blocks to reorg - that defaults to 3.