diff --git a/crates/swc_ecma_ast/src/class.rs b/crates/swc_ecma_ast/src/class.rs
index e7aa610a2aca..2d74c70a898b 100644
--- a/crates/swc_ecma_ast/src/class.rs
+++ b/crates/swc_ecma_ast/src/class.rs
@@ -64,16 +64,13 @@ impl Take for Class {
 pub struct ContentTagMember {
     pub span: Span,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub opening: Box<ContentTagStart>,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub contents: Box<ContentTagContent>,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub closing: Box<ContentTagEnd>,
 }
 
diff --git a/crates/swc_ecma_ast/src/expr.rs b/crates/swc_ecma_ast/src/expr.rs
index c0f0ceb48c35..6a00a2e23d2d 100644
--- a/crates/swc_ecma_ast/src/expr.rs
+++ b/crates/swc_ecma_ast/src/expr.rs
@@ -527,16 +527,13 @@ pub struct FnExpr {
 pub struct ContentTagExpression {
     pub span: Span,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub opening: Box<ContentTagStart>,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub contents: Box<ContentTagContent>,
 
-    #[cfg_attr(feature = "serde-impl", serde(flatten))]
-    #[span]
+    #[cfg_attr(feature = "serde-impl", serde())]
     pub closing: Box<ContentTagEnd>,
 }