diff --git a/.gitmodules b/.gitmodules
index dce0eaeee5..26ed387eda 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -9,3 +9,6 @@
 [submodule "xxHash"]
 	path = xxHash
 	url = ../xxHash
+[submodule "libdeflate"]
+	path = libdeflate
+	url = ../libdeflate
diff --git a/libdeflate b/libdeflate
new file mode 160000
index 0000000000..17ec6c94d8
--- /dev/null
+++ b/libdeflate
@@ -0,0 +1 @@
+Subproject commit 17ec6c94d842463b895ec41bf4880ff058a67938