diff --git a/inventory_provider/tasks/worker.py b/inventory_provider/tasks/worker.py
index 8e7e06d8ba2e17eadbad666a7dd383a2ddfdc427..487c4695298940669e495bf8e77ba90358461f94 100644
--- a/inventory_provider/tasks/worker.py
+++ b/inventory_provider/tasks/worker.py
@@ -148,7 +148,7 @@ def refresh_juniper_interface_list(hostname, netconf, interface_info, lab=False)
         interfaces_all_key,
         json.dumps(list(juniper.interface_addresses(netconf))))
 
-    interface_speeds = []
+    interface_speeds = {}
     if interface_info:
         interface_speeds = juniper.get_interface_speeds(interface_info)