diff --git a/.gitmodules b/.gitmodules
index cef81ae92cc..8ed93e40d52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -29,3 +29,6 @@
 [submodule "src/xxHash"]
 	path = src/xxHash
 	url = https://github.com/ceph/xxHash.git
+[submodule "src/isa-l"]
+	path = src/isa-l
+	url = https://github.com/ceph/isa-l
diff --git a/src/isa-l b/src/isa-l
new file mode 160000
index 00000000000..8faa0a2802e
--- /dev/null
+++ b/src/isa-l
@@ -0,0 +1 @@
+Subproject commit 8faa0a2802e95ab5c782d2f7036db92c9d19686e