diff --git a/lib/rpc_backend b/lib/rpc_backend
index 0ee46dca6f..97b1aa409a 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -24,6 +24,8 @@
 _XTRACE_RPC_BACKEND=$(set +o | grep xtrace)
 set +o xtrace
 
+RABBIT_USERID=${RABBIT_USERID:-stackrabbit}
+
 # Functions
 # ---------
 
diff --git a/stack.sh b/stack.sh
index cf157ab520..09466a6894 100755
--- a/stack.sh
+++ b/stack.sh
@@ -664,7 +664,6 @@ initialize_database_backends && echo "Using $DATABASE_TYPE database backend" ||
 # Rabbit connection info
 # In multi node DevStack, second node needs ``RABBIT_USERID``, but rabbit
 # isn't enabled.
-RABBIT_USERID=${RABBIT_USERID:-stackrabbit}
 if is_service_enabled rabbit; then
     RABBIT_HOST=${RABBIT_HOST:-$SERVICE_HOST}
     read_password RABBIT_PASSWORD "ENTER A PASSWORD TO USE FOR RABBIT."