diff --git a/.gitmodules b/.gitmodules
index 649eec5..cb7ea97 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7183,3 +7183,6 @@
 [submodule "libgsasl"]
 	path = libgsasl
 	url = ../../pool-internal/libgsasl
+[submodule "docbook-toys"]
+	path = docbook-toys
+	url = ../../pool-internal/docbook-toys
diff --git a/docbook-toys b/docbook-toys
new file mode 160000
index 0000000..e094adb
--- /dev/null
+++ b/docbook-toys
@@ -0,0 +1 @@
+Subproject commit e094adb61c2406a7a9ce538c0565a3e6fe21ac21