diff --git a/runtime/indent/README.txt b/runtime/indent/README.txt
index 8b11436..6498706 100644
--- a/runtime/indent/README.txt
+++ b/runtime/indent/README.txt
@@ -31,7 +31,7 @@
 to other buffers.
 
 To trigger the indenting after typing a word like "endif", add the word to the
-'cinkeys' option with "+=".
+'indentkeys' option with "+=".
 
 You normally set 'indentexpr' to evaluate a function and then define that
 function.  That function only needs to be defined once for as long as Vim is