diff --git a/lib/rules/wrap-iife.js b/lib/rules/wrap-iife.js
index ab4042e16247..7e756db8e280 100644
--- a/lib/rules/wrap-iife.js
+++ b/lib/rules/wrap-iife.js
@@ -112,7 +112,7 @@ module.exports = {
                 } else if (style === "inside" && !functionExpressionWrapped) {
                     context.report({
                         node,
-                        messageId: "WrapExpression",
+                        messageId: "wrapExpression",
                         fix(fixer) {
 
                             /*