diff --git a/src/services/codefixes/fixAddMissingMember.ts b/src/services/codefixes/fixAddMissingMember.ts
index 79b95e4799d..fe12249f176 100644
--- a/src/services/codefixes/fixAddMissingMember.ts
+++ b/src/services/codefixes/fixAddMissingMember.ts
@@ -59,7 +59,7 @@ namespace ts.codefix {
              /*decorators*/ undefined
             , /*modifiers*/ undefined
             , /*dotDotDotToken*/ undefined
-            , "name"
+            , "x"
             , /*questionToken*/ undefined
             , stringTypeNode);
         const indexSignature = createIndexSignatureDeclaration([indexingParameter], typeNode);
diff --git a/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts b/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts
index a5bde70c011..f653d21e02b 100644
--- a/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts
+++ b/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts
@@ -54,13 +54,12 @@ namespace ts.codefix {
                 return undefined;
             }
             const typeNode = checker.createTypeNode(indexInfoOfKind.type);
-            let name: string;
             const newIndexSignatureDeclaration = createIndexSignatureDeclaration(
                 [createParameter(
                       /*decorators*/undefined
                     , /*modifiers*/ undefined
                     , /*dotDotDotToken*/ undefined
-                    , name
+                    ,  getNameFromIndexInfo(indexInfoOfKind)
                     , /*questionToken*/ undefined
                     , kind === IndexKind.String ? createKeywordTypeNode(SyntaxKind.StringKeyword) : createKeywordTypeNode(SyntaxKind.NumberKeyword))]
                 , typeNode);
diff --git a/src/services/codefixes/helpers.ts b/src/services/codefixes/helpers.ts
index bbbe14ab337..67f53fb8e5a 100644
--- a/src/services/codefixes/helpers.ts
+++ b/src/services/codefixes/helpers.ts
@@ -234,4 +234,8 @@ namespace ts.codefix {
             , parameterTypeNode);
         return parameterNode;
     }
+
+    export function getNameFromIndexInfo(info: IndexInfo) {
+        return info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : "x"
+    }
 }
\ No newline at end of file