diff --git a/src/datasource/WMSGroup.js b/src/datasource/WMSGroup.js
index 8b881a1a88cf..52d6637ee4b1 100644
--- a/src/datasource/WMSGroup.js
+++ b/src/datasource/WMSGroup.js
@@ -166,7 +166,7 @@ export default class extends ngeoDatasourceOGCGroup {
     // (1) Collect layer names from data sources in the group
     for (const dataSource of this.dataSources) {
       if (dataSource instanceof ngeoDatasourceOGC && dataSource.visible) {
-        layerNames = layerNames.concat(dataSource.getWFSLayerNames());
+        layerNames = layerNames.concat(dataSource.getWMSLayerNames());
       }
     }