diff --git a/master/buildbot/steps/configurable.py b/master/buildbot/steps/configurable.py
index e11cce716d5a..ff898ab9af00 100644
--- a/master/buildbot/steps/configurable.py
+++ b/master/buildbot/steps/configurable.py
@@ -334,6 +334,7 @@ def getSchedulersAndProperties(self):
 
 eval_model = base_eval_model.clone()
 eval_model.nodes.append('Mul')
+eval_model.nodes.append('Slice')
 eval_model.nodes.append('Tuple')