diff --git a/doc-tools-check-languages.conf b/doc-tools-check-languages.conf
index 0304e47530..d586feadfb 100644
--- a/doc-tools-check-languages.conf
+++ b/doc-tools-check-languages.conf
@@ -4,7 +4,7 @@ declare -A DIRECTORIES=(
 
 # books to be built
 declare -A BOOKS=(
-    ["de"]="install-guide"
+    ["de"]="image-guide install-guide"
     ["fr"]="install-guide"
     ["id"]="image-guide install-guide"
     ["ja"]="ha-guide image-guide install-guide"