diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/MaterializedViewUtils.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/MaterializedViewUtils.java
index 73029b4ec1..0fbcf6b7d6 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/MaterializedViewUtils.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/MaterializedViewUtils.java
@@ -204,9 +204,8 @@ public class MaterializedViewUtils {
             CascadesContext cascadesContext,
             Function<CascadesContext, Plan> planRewriter,
             Plan rewrittenPlan, Plan originPlan) {
-        List<Slot> originOutputs = originPlan.getOutput();
-        if (originOutputs.size() != rewrittenPlan.getOutput().size()) {
-            return null;
+        if (originPlan.getOutputSet().size() != rewrittenPlan.getOutputSet().size()) {
+            return rewrittenPlan;
         }
         // After RBO, slot order may change, so need originSlotToRewrittenExprId which record
         // origin plan slot order