diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/Expr.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/Expr.java
index 09848e3d18..26f75d460a 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/Expr.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/Expr.java
@@ -2559,7 +2559,7 @@ public abstract class Expr extends TreeNode<Expr> implements ParseNode, Cloneabl
     }
 
     private MapType getActualMapType(MapType originMapType) {
-        return new MapType(getActualType(originMapType.getKeyType()), getActualType(originMapType.getValueType()));
+        return new MapType(originMapType.getKeyType(), originMapType.getValueType());
     }
 
     private ArrayType getActualArrayType(ArrayType originArrayType) {