diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EliminateSubplanRule.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EliminateSubplanRule.java
index 048e863..8a381f7 100644
--- a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EliminateSubplanRule.java
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/EliminateSubplanRule.java
@@ -74,7 +74,8 @@
         SubplanOperator subplan = (SubplanOperator) opRef.getValue();
         AbstractLogicalOperator rootOp = (AbstractLogicalOperator) subplan.getNestedPlans().get(0).getRoots().get(0)
                 .getValue();
-        if (rootOp.getOperatorTag() == LogicalOperatorTag.EMPTYTUPLESOURCE) {
+        if (rootOp.getOperatorTag() == LogicalOperatorTag.EMPTYTUPLESOURCE
+                || rootOp.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
             opRef.setValue(subplan.getInputs().get(0).getValue());
             return true;
         } else {