diff --git a/doc/org.texi b/doc/org.texi
index 7bc0247cf..492d8c5bd 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -9889,7 +9889,7 @@ In line [[(sc)]] we remember the current position.  [[(jump)][Line (jump)]]
 jumps to point-min.
 @end example
 
-@index indentation, in source blocks
+@cindex indentation, in source blocks
 Finally, you can use @code{-i} to preserve the indentation of a specific code
 block (@pxref{Editing source code}).
 
@@ -13803,7 +13803,7 @@ can be used to map arbitrary language names to existing major modes.
 @item org-src-window-setup
 Controls the way Emacs windows are rearranged when the edit buffer is created.
 @item org-src-preserve-indentation
-@index indentation, in source blocks
+@cindex indentation, in source blocks
 By default, the value is @code{nil}, which means that when code blocks are
 evaluated during export or tangled, they are re-inserted into the code block,
 which may replace sequences of spaces with tab characters.  When non-nil,