diff --git a/.gitmodules b/.gitmodules
index 2535437517..0f90c10a78 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -803,3 +803,8 @@
 	url = ../mysql.git
 	fetchRecurseSubmodules = on-demand
 	branch = .
+[submodule "compat"]
+	path = libs/compat
+	url = ../compat.git
+	fetchRecurseSubmodules = on-demand
+	branch = .
diff --git a/libs/compat b/libs/compat
new file mode 160000
index 0000000000..689825b2f9
--- /dev/null
+++ b/libs/compat
@@ -0,0 +1 @@
+Subproject commit 689825b2f9a31439a25df0e53ad1017771bfca6b