diff --git a/src/app/components/pab-table/pab-table.component.html b/src/app/components/pab-table/pab-table.component.html
index 293bd1b077c9dde9b999c953e080508a8b516288..063a7339aabc51054b508fbcb74405df7138c569 100644
--- a/src/app/components/pab-table/pab-table.component.html
+++ b/src/app/components/pab-table/pab-table.component.html
@@ -85,7 +85,7 @@
                     [class.select]="isSelect(cell)" [attr.rowspan]="rowSpan(cell)" [attr.colspan]="colSpan(cell)"
                     [title]="cellTitle(cell)">
 
-                    <input matInput *ngIf="isNumberInput(cell)" step="0.00000000000001" type="number"
+                    <input matInput *ngIf="isNumberInput(cell)" step="0.00000000000001" type="number" required
                         [(ngModel)]="cell.model.singleValue" (input)="inputValueChanged($event, cell)">
 
                     <mat-select #selectWidget *ngIf="isSelect(cell)" [value]="cell.modelValue"