diff --git a/Control/AthenaConfiguration/python/ComponentAccumulator.py b/Control/AthenaConfiguration/python/ComponentAccumulator.py
index a598164f9ab1f4f4670d6464869b987e1f556820..a3da15d73e5430f6bb3c99b11206c242667f797d 100644
--- a/Control/AthenaConfiguration/python/ComponentAccumulator.py
+++ b/Control/AthenaConfiguration/python/ComponentAccumulator.py
@@ -253,7 +253,8 @@ class ComponentAccumulator(object):
                                                               (comp.getJobOptName(),oldprop.getFullName(),newprop.getFullName()))
                     elif isinstance(oldprop,PublicToolHandleArray):
                             for newtool in newprop:
-                                if newtool not in oldprop: oldprop+=[newtool,]
+                                if newtool not in oldprop: 
+                                    oldprop+=[newtool,]
                             continue
                     elif isinstance(oldprop,ConfigurableAlgTool):
                         self._deduplicateComponent(oldprop,newprop)