diff --git a/.gitmodules b/.gitmodules
index 38e0606337..43d56e17f4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -76,3 +76,6 @@
 [submodule "auxil/prometheus-cpp"]
 	path = auxil/prometheus-cpp
 	url = https://github.com/zeek/prometheus-cpp
+[submodule "src/cluster/backend/zeromq/auxil/cppzmq"]
+	path = src/cluster/backend/zeromq/auxil/cppzmq
+	url = https://github.com/zeromq/cppzmq
diff --git a/src/cluster/backend/zeromq/auxil/cppzmq b/src/cluster/backend/zeromq/auxil/cppzmq
new file mode 160000
index 0000000000..c94c20743e
--- /dev/null
+++ b/src/cluster/backend/zeromq/auxil/cppzmq
@@ -0,0 +1 @@
+Subproject commit c94c20743ed7d4aa37835a5c46567ab0790d4acc