diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index cc712e308..0afbfcc5a 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -525,7 +525,7 @@ export class UserResolver {
       user.lastName = lastName
     }
 
-    if (alias && await validateAlias(alias)) {
+    if (alias && (await validateAlias(alias))) {
       user.alias = alias
     }
 
diff --git a/backend/src/graphql/resolver/util/validateAlias.test.ts b/backend/src/graphql/resolver/util/validateAlias.test.ts
index 733a09ffe..0cb790edb 100644
--- a/backend/src/graphql/resolver/util/validateAlias.test.ts
+++ b/backend/src/graphql/resolver/util/validateAlias.test.ts
@@ -117,8 +117,8 @@ describe('validate alias', () => {
     })
 
     describe('valid alias', () => {
-      it('resolves to void', async () => {
-        await expect(validateAlias('bibi')).resolves.toEqual(undefined)
+      it('resolves to true', async () => {
+        await expect(validateAlias('bibi')).resolves.toEqual(true)
       })
     })
   })