diff --git a/src/components/popover/tab/layer-tab.component.ts b/src/components/popover/tab/layer-tab.component.ts
index 3f5686d6..47f2407a 100644
--- a/src/components/popover/tab/layer-tab.component.ts
+++ b/src/components/popover/tab/layer-tab.component.ts
@@ -77,6 +77,6 @@ export class LayerTabComponent implements OnInit, KeyActionSaver {
     }
 
     private layerChanged(event) {
-        this.layer = event.value;
+        this.layer = +event.value;
     }
 }