diff --git a/tools/deployment/armada/multinode/armada-osh.yaml b/tools/deployment/armada/multinode/armada-osh.yaml
index 376f1e4d..6c90957f 100644
--- a/tools/deployment/armada/multinode/armada-osh.yaml
+++ b/tools/deployment/armada/multinode/armada-osh.yaml
@@ -1186,7 +1186,7 @@ data:
         node_selector_value: enabled
     network:
       interface:
-        tunnel: $tunnel_device
+        tunnel: ${TUNNEL_DEVICE}
     conf:
       neutron:
         DEFAULT: