diff --git a/navalplanner-webapp/src/main/webapp/orders/_assignmentsBox.zul b/navalplanner-webapp/src/main/webapp/orders/_assignmentsBox.zul
index cce0da3d4..37f595978 100644
--- a/navalplanner-webapp/src/main/webapp/orders/_assignmentsBox.zul
+++ b/navalplanner-webapp/src/main/webapp/orders/_assignmentsBox.zul
@@ -1,4 +1,4 @@
-<panel title="${i18n:_('Materials')}" border="normal">
+<panel title="${i18n:_('Materials')}" border="normal" width="600px">
     <panelchildren>
         <newdatasortablegrid id="gridMaterials"
             fixedLayout="false"