diff --git a/doc/exchange.txt b/doc/exchange.txt
index 4462816..5a08b68 100644
--- a/doc/exchange.txt
+++ b/doc/exchange.txt
@@ -55,7 +55,7 @@ To change the default mappings, simply provide your own mappings to the
 commands below. The default mappings are as follows:
 
     nmap cx <Plug>(Exchange)
-    xmap cx <Plug>(Exchange)
+    xmap X <Plug>(Exchange)
     nmap cxc <Plug>(ExchangeClear)
     nmap cxx <Plug>(ExchangeLine)