diff --git a/packages/client/src/lib/api/locker.ts b/packages/client/src/lib/api/locker.ts
index abb9398d..b25f1e72 100644
--- a/packages/client/src/lib/api/locker.ts
+++ b/packages/client/src/lib/api/locker.ts
@@ -6,6 +6,7 @@ import {
 	BadRequestErrorSchema,
 	BlockedErrorSchema,
 	CantClaimErrorSchema,
+	CantUnclaimErrorSchema,
 	createErrorResponse,
 	createSuccessResponse,
 	ForbiddenErrorSchema,
@@ -111,7 +112,7 @@ export async function apiClaimLocker(
 
 export async function apiUnclaimLocker(): Promise<
 	| SuccessResponse<UnclaimLockerResponse>
-	| ErrorResponse<BlockedError | ForbiddenError | CantClaimError>
+	| ErrorResponse<BlockedError | ForbiddenError | CantUnclaimError>
 > {
 	const response = await apiRequest<UnclaimLockerResponse>('/locker/unclaim', true, {
 		method: 'POST'
@@ -128,9 +129,9 @@ export async function apiUnclaimLocker(): Promise<
 	if (forbidden.success) {
 		return forbidden.data as ErrorResponse<ForbiddenError>;
 	}
-	const cantClaim = createErrorResponse(CantClaimErrorSchema).safeParse(response);
-	if (cantClaim.success) {
-		return cantClaim.data as ErrorResponse<CantClaimError>;
+	const cantUnclaim = createErrorResponse(CantUnclaimErrorSchema).safeParse(response);
+	if (cantUnclaim.success) {
+		return cantUnclaim.data as ErrorResponse<CantUnclaimError>;
 	}
 	const other = createErrorResponse().parse(response);
 	throw other.error;
diff --git a/packages/client/src/lib/api/schema.ts b/packages/client/src/lib/api/schema.ts
index 1e0cdc85..bc3b4ce6 100644
--- a/packages/client/src/lib/api/schema.ts
+++ b/packages/client/src/lib/api/schema.ts
@@ -65,6 +65,13 @@ export const CantClaimErrorSchema = z
 	})
 	.passthrough();
 
+export const CantUnclaimErrorSchema = z
+	.object({
+		code: z.literal(403),
+		name: z.literal('CantUnclaim')
+	})
+	.passthrough();
+
 export const InternalErrorSchema = z.object({
 	code: z.literal(500),
 	name: z.literal('InternalError')
diff --git a/packages/server/src/locker/data.ts b/packages/server/src/locker/data.ts
index 9e32740d..869320ea 100644
--- a/packages/server/src/locker/data.ts
+++ b/packages/server/src/locker/data.ts
@@ -6,7 +6,7 @@ import type {
 	UpdateItemOutput
 } from 'aws-sdk/clients/dynamodb';
 import { adminId, dynamoDB, TableName } from '../util/database';
-import { CantClaimError, ForbiddenError, NotFoundError } from '../util/error';
+import { CantClaimError, CantUnclaimError, ForbiddenError, NotFoundError } from '../util/error';
 import type { AWSError } from 'aws-sdk';
 
 export const claimLocker = async function (
@@ -119,7 +119,7 @@ export const unclaimLocker = async function (
 			lockerId: res.Attributes.lockerId.S
 		};
 	} else {
-		throw new CantClaimError('This user is not claimed an locker yet', { id });
+		throw new CantUnclaimError('This user is not claimed an locker yet', { id });
 	}
 };
 
diff --git a/packages/server/src/util/error.ts b/packages/server/src/util/error.ts
index a5cd5962..fe418bff 100644
--- a/packages/server/src/util/error.ts
+++ b/packages/server/src/util/error.ts
@@ -63,6 +63,12 @@ export class CantClaimError extends LockerError {
 	}
 }
 
+export class CantUnclaimError extends LockerError {
+	constructor(message?: string, additionalInfo?: Record<string, unknown>) {
+		super(403, 'CantUnclaim', message, additionalInfo);
+	}
+}
+
 export class InternalError extends LockerError {
 	constructor(message?: string, additionalInfo?: Record<string, unknown>) {
 		super(500, 'InternalError', message, additionalInfo);
diff --git a/packages/types/index.d.ts b/packages/types/index.d.ts
index 0e941237..e9a851e9 100644
--- a/packages/types/index.d.ts
+++ b/packages/types/index.d.ts
@@ -249,6 +249,11 @@ type CantClaimError = LockerError & {
 	name: 'CantClaim';
 };
 
+type CantUnclaimError = LockerError & {
+	code: 403;
+	name: 'CantUnclaim';
+};
+
 type InternalError = LockerError & {
 	code: 500;
 	name: 'InternalError';