diff --git a/.gitmodules b/.gitmodules
index f4d94b037a..75a6744196 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -818,3 +818,8 @@
 	url = ../cobalt.git
 	fetchRecurseSubmodules = on-demand
 	branch = .
+[submodule "charconv"]
+	path = libs/charconv
+	url = ../charconv.git
+	fetchRecurseSubmodules = on-demand
+	branch = .
diff --git a/libs/charconv b/libs/charconv
new file mode 160000
index 0000000000..2e74155a36
--- /dev/null
+++ b/libs/charconv
@@ -0,0 +1 @@
+Subproject commit 2e74155a362860ef84cb26cf773820e78f428020