diff --git a/apps/web/components/eventtype/CustomEventTypeModal.tsx b/apps/web/components/eventtype/CustomEventTypeModal.tsx
index 5a6ab8c5c4..441f191301 100644
--- a/apps/web/components/eventtype/CustomEventTypeModal.tsx
+++ b/apps/web/components/eventtype/CustomEventTypeModal.tsx
@@ -53,8 +53,12 @@ const CustomEventTypeModalForm: FC<CustomEventTypeModalFormProps> = (props) => {
         type="text"
         placeholder={placeHolder_}
         {...register("customEventName", {
-          validate: (value) =>
-            validateCustomEventName(value, t("invalid_event_name_variables"), event.bookingFields),
+          validate: (value) => {
+            const validationResult = validateCustomEventName(value, event.bookingFields);
+            return typeof validationResult === "string"
+              ? t("invalid_event_name_variables", { item: validationResult })
+              : validationResult;
+          },
         })}
         className="mb-0"
       />
diff --git a/apps/web/modules/event-types/views/event-types-single-view.tsx b/apps/web/modules/event-types/views/event-types-single-view.tsx
index 5e6ea48098..1110a81f5e 100644
--- a/apps/web/modules/event-types/views/event-types-single-view.tsx
+++ b/apps/web/modules/event-types/views/event-types-single-view.tsx
@@ -384,13 +384,15 @@ const EventTypePage = (props: EventTypeSetupProps & { allActiveWorkflows?: Workf
           // Make it optional because it's not submitted from all tabs of the page
           eventName: z
             .string()
-            .refine(
-              (val) =>
-                validateCustomEventName(val, t("invalid_event_name_variables"), bookingFields) === true,
-              {
-                message: t("invalid_event_name_variables"),
+            .superRefine((val, ctx) => {
+              const validationResult = validateCustomEventName(val, bookingFields);
+              if (validationResult !== true) {
+                ctx.addIssue({
+                  code: z.ZodIssueCode.custom,
+                  message: t("invalid_event_name_variables", { item: validationResult }),
+                });
               }
-            )
+            })
             .optional(),
           length: z.union([z.string().transform((val) => +val), z.number()]).optional(),
           offsetStart: z.union([z.string().transform((val) => +val), z.number()]).optional(),
diff --git a/apps/web/public/static/locales/en/common.json b/apps/web/public/static/locales/en/common.json
index 4d0d6bf1ba..73fa6b2594 100644
--- a/apps/web/public/static/locales/en/common.json
+++ b/apps/web/public/static/locales/en/common.json
@@ -1926,7 +1926,7 @@
   "cancel_url_info": "The URL to cancel the booking",
   "reschedule_url_variable": "Reschedule URL",
   "reschedule_url_info": "The URL to reschedule the booking",
-  "invalid_event_name_variables": "There is an invalid variable in your event name",
+  "invalid_event_name_variables": "{{item}} is an invalid variable in your event name",
   "select_all": "Select All",
   "default_conferencing_bulk_title": "Bulk update existing event types",
   "members_default_schedule": "Member's default schedule",
diff --git a/packages/core/event.test.ts b/packages/core/event.test.ts
index 4e4195b570..d0580b2f13 100644
--- a/packages/core/event.test.ts
+++ b/packages/core/event.test.ts
@@ -356,7 +356,7 @@ describe("event tests", () => {
 
   describe("fn: validateCustomEventName", () => {
     it("should be valid when no variables used", () => {
-      expect(event.validateCustomEventName("foo", "error message")).toBe(true);
+      expect(event.validateCustomEventName("foo")).toBe(true);
     });
 
     [
@@ -371,24 +371,24 @@ describe("event tests", () => {
       "USER",
     ].forEach((value) => {
       it(`should support {${value}} variable`, () => {
-        expect(event.validateCustomEventName(`foo {${value}} bar`, "error message")).toBe(true);
+        expect(event.validateCustomEventName(`foo {${value}} bar`)).toBe(true);
 
-        expect(event.validateCustomEventName(`{${value}} bar`, "error message")).toBe(true);
+        expect(event.validateCustomEventName(`{${value}} bar`)).toBe(true);
 
-        expect(event.validateCustomEventName(`foo {${value}}`, "error message")).toBe(true);
+        expect(event.validateCustomEventName(`foo {${value}}`)).toBe(true);
       });
     });
 
     it("should support booking field variables", () => {
       expect(
-        event.validateCustomEventName("foo{customField}bar", "error message", {
+        event.validateCustomEventName("foo{customField}bar", {
           customField: true,
         })
       ).toBe(true);
     });
 
-    it("should return error when invalid variable used", () => {
-      expect(event.validateCustomEventName("foo{nonsenseField}bar", "error message")).toBe("error message");
+    it("should return variable when invalid variable used", () => {
+      expect(event.validateCustomEventName("foo{nonsenseField}bar")).toBe("{nonsenseField}");
     });
   });
 });
diff --git a/packages/core/event.ts b/packages/core/event.ts
index 0b39a1752a..0383b7ec83 100644
--- a/packages/core/event.ts
+++ b/packages/core/event.ts
@@ -100,11 +100,7 @@ export function getEventName(eventNameObj: EventNameObjectType, forAttendeeView
   return dynamicEventName;
 }
 
-export const validateCustomEventName = (
-  value: string,
-  message: string,
-  bookingFields?: Prisma.JsonObject
-) => {
+export const validateCustomEventName = (value: string, bookingFields?: Prisma.JsonObject) => {
   let customInputVariables: string[] = [];
   if (bookingFields) {
     customInputVariables = Object.keys(bookingFields).map((customInput) => {
@@ -131,7 +127,7 @@ export const validateCustomEventName = (
   if (matches?.length) {
     for (const item of matches) {
       if (!validVariables.includes(item)) {
-        return message;
+        return item;
       }
     }
   }