diff --git a/apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html b/apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html
index 7795688c0..dba624064 100644
--- a/apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html
+++ b/apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html
@@ -186,7 +186,7 @@
     >
       <mat-form-field appearance="outline" class="w-100">
         <mat-label i18n>Quantity</mat-label>
-        <input formControlName="quantity" matInput type="number" />
+        <input formControlName="quantity" matInput type="number" [min]="0" />
       </mat-form-field>
     </div>
     <div