1 files changed, 1 insertions, 0 deletions
diff --git a/catalog-ui/src/app/ng2/pages/interface-operation/operation-creator/param-row/param-row.component.ts b/catalog-ui/src/app/ng2/pages/interface-operation/operation-creator/param-row/param-row.component.ts
index de6e703404..76cf73ff17 100644
--- a/catalog-ui/src/app/ng2/pages/interface-operation/operation-creator/param-row/param-row.component.ts
+++ b/catalog-ui/src/app/ng2/pages/interface-operation/operation-creator/param-row/param-row.component.ts
@@ -98,6 +98,7 @@ export class ParamRowComponent {
             ),
             prop => new DropdownValue(prop.uniqueId, prop.name)
         );
+        this.filteredInputProps.unshift(new DropdownValue("",""));
 
         this.operationOutputCats = _.filter(
             _.map(