diff --git a/contribs/gmf/src/layertree/component.html b/contribs/gmf/src/layertree/component.html
index 4cbf0a457178..84963843b752 100644
--- a/contribs/gmf/src/layertree/component.html
+++ b/contribs/gmf/src/layertree/component.html
@@ -279,7 +279,7 @@
 <ul
   id="gmf-layertree-layer-group-{{::layertreeCtrl.uid}}"
   ng-if="::layertreeCtrl.node.children"
-  ng-class="{collapse: !layertreeCtrl.isRoot, show: layertreeCtrl.node.metadata.isExpanded}"
+  ng-class="{collapse: !(layertreeCtrl.isRoot || gmfLayertreeCtrl.isExpanded), show: layertreeCtrl.node.metadata.isExpanded}"
   ngeo-sortable="::layertreeCtrl.isRoot && layertreeCtrl.node.children"
   ngeo-sortable-options="{handleClassName: 'ngeo-sortable-handle', draggerClassName: 'gmf-layertree-dragger', placeholderClassName : 'gmf-layertree-curr-drag-item'}"
   ngeo-sortable-callback="::gmfLayertreeCtrl.afterReorder"
diff --git a/contribs/gmf/src/layertree/component.js b/contribs/gmf/src/layertree/component.js
index 16d64b825bd6..d90df704cf73 100644
--- a/contribs/gmf/src/layertree/component.js
+++ b/contribs/gmf/src/layertree/component.js
@@ -176,7 +176,8 @@ const layertreeComponent = {
   bindings: {
     'map': '=gmfLayertreeMap',
     'dimensions': '=?gmfLayertreeDimensions',
-    'openLinksInNewWindow': '<?gmfLayertreeOpenlinksinnewwindow'
+    'openLinksInNewWindow': '<?gmfLayertreeOpenlinksinnewwindow',
+    'isExpanded': '<?gmfLayertreeIsexpanded'
   },
   template: gmfLayertreeTemplate
 };
@@ -229,6 +230,8 @@ function Controller($element, $scope, ngeoLayerHelper,
   /** @type {number} */
   this.legendIconHeight;
 
+  /** @type {boolean} */
+  this.isExpanded;
 
   /**
    * @type {!angular.IScope}