diff --git a/arangod/Aql/Optimizer.cpp b/arangod/Aql/Optimizer.cpp
index 5c656c7175..ac5ba2ce06 100644
--- a/arangod/Aql/Optimizer.cpp
+++ b/arangod/Aql/Optimizer.cpp
@@ -464,12 +464,12 @@ void Optimizer::setupRules () {
     registerRule("distribute-filtercalc-to-cluster",
                  distributeFilternCalcToCluster,
                  distributeFilternCalcToCluster_pass10,
-                 false);
+                 true);
 
     registerRule("distribute-sort-to-cluster",
                  distributeSortToCluster,
                  distributeSortToCluster_pass10,
-                 false);
+                 true);
     
     registerRule("remove-unnecessary-remote-scatter",
                  removeUnnecessaryRemoteScatter,