diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
index 93bcb92f58062a4..c0847957fcb23a8 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
@@ -184,7 +184,11 @@ public String toSql() {
             StringBuilder sb = new StringBuilder();
             sb.append("DEFAULT ");
             if (value != null) {
-                sb.append('"').append(value).append('"');
+                if (defaultValueExprDef != null) {
+                    sb.append(value);
+                } else {
+                    sb.append('"').append(value).append('"');
+                }
             } else {
                 sb.append("NULL");
             }