diff --git a/.gitmodules b/.gitmodules
index de2e88cd3c..88f48dd9bb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -539,3 +539,7 @@
 	path = libs/stacktrace
 	url = ../stacktrace.git
 	fetchRecurseSubmodules = on-demand
+[submodule "poly_collection"]
+	path = libs/poly_collection
+	url = ../poly_collection.git
+	fetchRecurseSubmodules = on-demand
diff --git a/libs/poly_collection b/libs/poly_collection
new file mode 160000
index 0000000000..9bfae0679a
--- /dev/null
+++ b/libs/poly_collection
@@ -0,0 +1 @@
+Subproject commit 9bfae0679aa1381f7c44367fb47853cce271844a