Fixed index module reference.
diff --git a/Doc/lib/libarray.tex b/Doc/lib/libarray.tex
index 145bb4f..3150f71 100644
--- a/Doc/lib/libarray.tex
+++ b/Doc/lib/libarray.tex
@@ -32,7 +32,7 @@
 type can't represent the full range of C's unsigned (long) integers.
 
 See also built-in module \code{struct}.
-\bimodindex{struct}
+\refbimodindex{struct}
 
 The module defines the following function: