diff --git a/doc/ref/libguile-smobs.texi b/doc/ref/libguile-smobs.texi
index 0af81fed7..0a51ed656 100644
--- a/doc/ref/libguile-smobs.texi
+++ b/doc/ref/libguile-smobs.texi
@@ -452,7 +452,7 @@ scm_markcdr (SCM obj)
 
 @node Remembering During Operations
 @subsection Remembering During Operations
-@cindex Remembering
+@cindex remembering
 
 It's important that a smob is visible to the garbage collector
 whenever its contents are being accessed.  Otherwise it could be freed