diff --git a/client/src/components/NewSaleForm.tsx b/client/src/components/NewSaleForm.tsx
index 1ef9b9e..0d8bdbf 100644
--- a/client/src/components/NewSaleForm.tsx
+++ b/client/src/components/NewSaleForm.tsx
@@ -281,7 +281,7 @@ export default function NewSaleForm({ onSaveSale }: NewSaleFormProps) {
                       <FormItem>
                         <FormLabel>Quantité <span className="text-destructive">*</span></FormLabel>
                         <FormControl>
-                          <Input type="number" min="1" placeholder="1" {...field} />
+                          <Input type="number" min="1" placeholder="Entrez la quantité" {...field} />
                         </FormControl>
                         <FormMessage />
                       </FormItem>
diff --git a/client/src/lib/validation.ts b/client/src/lib/validation.ts
index 1f30c2d..47041d5 100644
--- a/client/src/lib/validation.ts
+++ b/client/src/lib/validation.ts
@@ -30,7 +30,15 @@ export function validateRequiredFields(formData: any): string[] {
   ];
   
   return requiredFields
-    .filter(field => !formData[field.key] || formData[field.key].toString().trim() === '')
+    .filter(field => {
+      const value = formData[field.key];
+      // Pour la quantité, accepter 0 comme valeur valide
+      if (field.key === 'quantite') {
+        return value === '' || value === null || value === undefined;
+      }
+      // Pour les autres champs, vérifier si vide ou juste des espaces
+      return !value || value.toString().trim() === '';
+    })
     .map(field => field.label);
 }