diff --git a/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh b/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
index bd6db6c..c697530 100755
--- a/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
+++ b/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
@@ -58,7 +58,7 @@ function xhtml_doToc {
 
     # Define table of content configuration file, the file used to
     # produce the table of content XHTML output code.
-    local TOC_CONFIG=${TUNEUP_BACKEND_CONFIG}/toc.awk
+    local TOC_CONFIG=${CONFIG_DIR}/toc.awk
 
     # Verify table of content configuration file.
     cli_checkFiles ${TOC_CONFIG}