diff --git a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ComplexUnnestToProductRule.java b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ComplexUnnestToProductRule.java
index d2a905f..50b3d47 100644
--- a/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ComplexUnnestToProductRule.java
+++ b/algebricks/algebricks-rewriter/src/main/java/edu/uci/ics/hyracks/algebricks/rewriter/rules/ComplexUnnestToProductRule.java
@@ -107,9 +107,9 @@
             }
         }
         innerRoot = buildOperatorChain(innerOps, ets, context);
+        context.computeAndSetTypeEnvironmentForOperator(innerRoot);
         outerRoot = buildOperatorChain(outerOps, null, context);
         context.computeAndSetTypeEnvironmentForOperator(outerRoot);
-        context.computeAndSetTypeEnvironmentForOperator(innerRoot);
 
         InnerJoinOperator product = new InnerJoinOperator(
                 new MutableObject<ILogicalExpression>(ConstantExpression.TRUE));