diff --git a/doc-tools-check-languages.conf b/doc-tools-check-languages.conf
index 10bf921b20..a75cfebbf3 100644
--- a/doc-tools-check-languages.conf
+++ b/doc-tools-check-languages.conf
@@ -5,7 +5,7 @@ declare -A DIRECTORIES=(
 
 # books to be built
 declare -A BOOKS=(
-    ["ja"]="user-guide user-guide-admin install-guide networking-guide"
+    ["ja"]="image-guide user-guide user-guide-admin install-guide networking-guide"
 )
 
 # draft books