diff --git a/serde_codegen/Cargo.toml b/serde_codegen/Cargo.toml
index 0ac76364..0c53dd7f 100644
--- a/serde_codegen/Cargo.toml
+++ b/serde_codegen/Cargo.toml
@@ -25,5 +25,5 @@ clippy = { version = "^0.*", optional = true }
 quote = "0.3.8"
 serde_codegen_internals = { version = "=0.11.2", default-features = false, path = "../serde_codegen_internals" }
 syn = { version = "0.10", features = ["aster", "visit"] }
-syntex = { version = "^0.50.0", optional = true }
-syntex_syntax = { version = "^0.50.0", optional = true }
+syntex = { version = "^0.52.0", optional = true }
+syntex_syntax = { version = "^0.52.0", optional = true }
diff --git a/serde_codegen/src/lib.rs b/serde_codegen/src/lib.rs
index a2afd7bd..797082b7 100644
--- a/serde_codegen/src/lib.rs
+++ b/serde_codegen/src/lib.rs
@@ -38,11 +38,11 @@ fn syntex_registry() -> syntex::Registry {
 
         impl fold::Folder for StripAttributeFolder {
             fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
-                match attr.node.value.node {
-                    ast::MetaItemKind::List(ref n, _) if n == &"serde" => { return None; }
-                    _ => {}
+                if attr.value.name == "serde" {
+                    if let ast::MetaItemKind::List(..) = attr.value.node {
+                        return None;
+                    }
                 }
-
                 Some(attr)
             }
 
@@ -118,11 +118,10 @@ macro_rules! shim {
             struct MarkSerdeAttributesUsed;
             impl visit::Visitor for MarkSerdeAttributesUsed {
                 fn visit_attribute(&mut self, attr: &ast::Attribute) {
-                    match attr.node.value.node {
-                        ast::MetaItemKind::List(ref name, _) if name == "serde" => {
+                    if attr.value.name == "serde" {
+                        if let ast::MetaItemKind::List(..) = attr.value.node {
                             attr::mark_used(attr);
                         }
-                        _ => {}
                     }
                 }
             }