diff --git a/src/structures/dto/structure.dto.ts b/src/structures/dto/structure.dto.ts
index 4ac74624d24ab100e29d67a92a5f161e074d90b9..b4e417214280f76147dde7e07c55efc70d2a0100 100644
--- a/src/structures/dto/structure.dto.ts
+++ b/src/structures/dto/structure.dto.ts
@@ -46,6 +46,7 @@ export class structureDto {
 
   @ArrayNotEmpty()
   publics: string[];
+  @IsNotEmpty()
   freeWorkShop: boolean;
   @IsNotEmpty()
   nbComputers: number;