diff --git a/pkgs/applications/office/libreoffice/libreoffice-srcs-additions.json b/pkgs/applications/office/libreoffice/libreoffice-srcs-additions.json
index 75d4cced92a6..5b4363189f7f 100644
--- a/pkgs/applications/office/libreoffice/libreoffice-srcs-additions.json
+++ b/pkgs/applications/office/libreoffice/libreoffice-srcs-additions.json
@@ -1,3 +1,5 @@
 {
-  "LIBGLTF": {"subdir": "libgltf/"}
+  "LIBGLTF": {"subdir": "libgltf/"},
+  "ODFVALIDATOR": {"subdir": "../extern/"},
+  "OFFICEOTRON": {"subdir": "../extern/"}
 }