diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/AggregationNode.java b/fe/fe-core/src/main/java/org/apache/doris/planner/AggregationNode.java
index e4e3170379dadd..5d00144f05c605 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/AggregationNode.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/AggregationNode.java
@@ -176,6 +176,9 @@ public void init(Analyzer analyzer) throws UserException {
         // to our input; our conjuncts don't get substituted because they already
         // refer to our output
         outputSmap = getCombinedChildSmap();
+        if (aggInfo.isMerge()) {
+            aggInfo.substitute(aggInfo.getIntermediateSmap(), analyzer);
+        }
         aggInfo.substitute(outputSmap, analyzer);
 
         // assert consistent aggregate expr and slot materialization