diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/implementation/AggregateStrategies.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/implementation/AggregateStrategies.java
index edbd28677b4a00..e1095df7bab0b9 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/implementation/AggregateStrategies.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/implementation/AggregateStrategies.java
@@ -1766,7 +1766,7 @@ private List<PhysicalHashAggregate<? extends Plan>> fourPhaseAggregateWithDistin
                                 AggregateFunction nonDistinct = aggregateFunction
                                         .withDistinctAndChildren(false, ImmutableList.copyOf(aggChild));
                                 AggregateExpression nonDistinctAggExpr = new AggregateExpression(nonDistinct,
-                                        distinctLocalParam, aggregateFunction.child(0));
+                                        distinctLocalParam, aggregateFunction);
                                 return nonDistinctAggExpr;
                             } else {
                                 needUpdateSlot.add(aggregateFunction);
diff --git a/regression-test/suites/nereids_syntax_p0/agg_4_phase.groovy b/regression-test/suites/nereids_syntax_p0/agg_4_phase.groovy
index 4a3e60afb73e85..19cac99c153fa7 100644
--- a/regression-test/suites/nereids_syntax_p0/agg_4_phase.groovy
+++ b/regression-test/suites/nereids_syntax_p0/agg_4_phase.groovy
@@ -56,4 +56,6 @@ suite("agg_4_phase") {
         contains ":VAGGREGATE (update serialize)"
     }
     qt_4phase (test_sql)
+
+    sql """select GROUP_CONCAT(distinct name, " ") from agg_4_phase_tbl;"""
 }
\ No newline at end of file