diff --git a/Package.swift b/Package.swift
index b7352bd3c..76c25ad60 100644
--- a/Package.swift
+++ b/Package.swift
@@ -20,7 +20,7 @@ let package = Package(
         .plugin(name: "MetaProtocolCodable", targets: ["MetaProtocolCodable"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"602.0.0"),
+        .package(url: "https://github.com/swiftlang/swift-syntax.git", "509.1.0"..<"603.0.0"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.0.4"),
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.2"),
         .package(url: "https://github.com/swiftlang/swift-docc-plugin", from: "1.0.0"),
diff --git a/Sources/HelperCoders/ValueCoders/Number.swift b/Sources/HelperCoders/ValueCoders/Number.swift
index 24a01c75e..60bcc5df0 100644
--- a/Sources/HelperCoders/ValueCoders/Number.swift
+++ b/Sources/HelperCoders/ValueCoders/Number.swift
@@ -3,7 +3,7 @@
 protocol NumberCodingStrategy: ValueCodingStrategy where Value == Self {}
 
 public extension ValueCodingStrategy
-where Value: Decodable & ExpressibleByIntegerLiteral & LosslessStringConvertible
+where Value: Decodable & ExpressibleByIntegerLiteral & LosslessStringConvertible & Sendable
 {
     /// Decodes numeric data from the given `decoder`.
     ///
diff --git a/Sources/PluginCore/Variables/Type/EnumVariable.swift b/Sources/PluginCore/Variables/Type/EnumVariable.swift
index 3c621b995..3914db302 100644
--- a/Sources/PluginCore/Variables/Type/EnumVariable.swift
+++ b/Sources/PluginCore/Variables/Type/EnumVariable.swift
@@ -84,13 +84,19 @@ package struct EnumVariable: TypeVariable, DeclaredVariable {
         let caseEncodeExpr: CaseCode = { name, variables in
             let args = Self.encodingArgs(representing: variables)
             let callee: ExprSyntax = ".\(name)"
-            let fExpr =
-                if !args.isEmpty {
-                    FunctionCallExprSyntax(callee: callee) { args }
-                } else {
-                    FunctionCallExprSyntax(calledExpression: callee) {}
-                }
-            return ExprSyntax(fExpr)
+            if args.isEmpty {
+                /// No associated values: return just the case name without parentheses
+                return callee
+            } else {
+                let fExpr = FunctionCallExprSyntax(
+                    calledExpression: callee,
+                    leftParen: .leftParenToken(),
+                    arguments: args,
+                    rightParen: .rightParenToken(),
+                    trailingClosure: nil
+                )
+                return ExprSyntax(fExpr)
+            }
         }
         self.init(
             from: decl, in: context,
@@ -878,3 +884,4 @@ fileprivate extension EnumVariable {
     /// This encoder is passed to each case for encoding.
     static var contentEncoder: TokenSyntax { "contentEncoder" }
 }
+
diff --git a/Tests/MetaCodableTests/ConformCodableTests.swift b/Tests/MetaCodableTests/ConformCodableTests.swift
index 6a8a793ce..3f294cd03 100644
--- a/Tests/MetaCodableTests/ConformCodableTests.swift
+++ b/Tests/MetaCodableTests/ConformCodableTests.swift
@@ -38,6 +38,15 @@ struct ConformEncodableTests {
                         .init(message: "Remove @ConformEncodable attribute")
                     ]
                 ),
+                .init(
+                    id: Codable.misuseID,
+                    message:
+                        "@Codable can't be used in combination with @ConformEncodable",
+                    line: 2, column: 1,
+                    fixIts: [
+                        .init(message: "Remove @Codable attribute")
+                    ]
+                ),
                 .init(
                     id: ConformEncodable.misuseID,
                     message:
@@ -491,3 +500,4 @@ struct ConformDecodableTests {
         }
     }
 }
+