diff --git a/src/pathcomp/frontend/service/algorithms/KDisjointPathAlgorithm.py b/src/pathcomp/frontend/service/algorithms/KDisjointPathAlgorithm.py
index 03d9295be6f9a9fafb23de6f4cffaeb0604ce15e..eac91501a284981918e462f56ec44146b8a27b52 100644
--- a/src/pathcomp/frontend/service/algorithms/KDisjointPathAlgorithm.py
+++ b/src/pathcomp/frontend/service/algorithms/KDisjointPathAlgorithm.py
@@ -199,7 +199,7 @@ class KDisjointPathAlgorithm(_Algorithm):
                 algorithm.link_list = self.remove_traversed_links(algorithm.link_list, path_endpoints)
 
         self.json_reply = dict()
-        response_list = self.json_reply.get('response-list', [])
+        response_list = self.json_reply.setdefault('response-list', [])
         for service_key,paths in service_to_paths.items():
             response = {'serviceId': {
                 'contextId': service_key[0],