diff --git a/README.md b/README.md
index 0eb89a9..9110bfb 100644
--- a/README.md
+++ b/README.md
@@ -267,6 +267,7 @@ Here's a sample context object:
 {
     "cases": [
         {
+            "index": 0,
             "name": "caseName",
             "parameters": {
                 "name": "parameterName",
diff --git a/Sources/EnumeratorMacroImpl/Types/ECase.swift b/Sources/EnumeratorMacroImpl/Types/ECase.swift
index 11981c3..89efd11 100644
--- a/Sources/EnumeratorMacroImpl/Types/ECase.swift
+++ b/Sources/EnumeratorMacroImpl/Types/ECase.swift
@@ -3,10 +3,12 @@ import SwiftSyntax
 import Mustache
 
 struct ECase {
+    let index: Int
     let name: EString
     let parameters: EParameters
 
-    init(from element: EnumCaseElementSyntax) throws {
+    init(index: Int, from element: EnumCaseElementSyntax) throws {
+        self.index = index
         self.name = .init(element.name.trimmedDescription)
         let parameters = element.parameterClause?.parameters ?? []
         self.parameters = .init(
diff --git a/Sources/EnumeratorMacroImpl/Types/ECases.swift b/Sources/EnumeratorMacroImpl/Types/ECases.swift
index 63534d2..e20a8bd 100644
--- a/Sources/EnumeratorMacroImpl/Types/ECases.swift
+++ b/Sources/EnumeratorMacroImpl/Types/ECases.swift
@@ -6,7 +6,9 @@ struct ECases {
 
     init(elements: [EnumCaseElementSyntax]) throws {
         self.underlying = .init(
-            underlying: try elements.map(ECase.init(from:))
+            underlying: try elements.enumerated().map { idx, element in
+                try ECase(index: idx, from: element)
+            }
         )
     }
 }