diff --git a/components/lib/tree/Tree.spec.js b/components/lib/tree/Tree.spec.js
index 2e685e9fe..e9cacca40 100644
--- a/components/lib/tree/Tree.spec.js
+++ b/components/lib/tree/Tree.spec.js
@@ -55,12 +55,12 @@ describe('Tree.vue', () => {
         expect(wrapper.emitted('filter')).toBeTruthy();
     });
 
-    it('should render icon', ({expect})=>{
+    it('should render icon', ({ expect }) => {
         expect(wrapper.find('span.pi-inbox').exists()).toBeTruthy();
-        expect(wrapper.find('span.pi-inbox').classes('p-treenode-icon')).toBeTruthy()
-    })
+        expect(wrapper.find('span.pi-inbox').classes('p-treenode-icon')).toBeTruthy();
+    });
 
-    it('should render icon slot', ({expect})=>{
+    it('should render icon slot', ({ expect }) => {
         let wrapper = mount(Tree, {
             slots: {
                 nodeIcon: `<i data-node-icon/>`
@@ -80,5 +80,5 @@ describe('Tree.vue', () => {
         const nodeIcon = wrapper.find('i[data-node-icon]');
 
         expect(nodeIcon.exists()).toBeTruthy();
-    })
+    });
 });
diff --git a/components/lib/tree/TreeNode.vue b/components/lib/tree/TreeNode.vue
index 11bacc5e0..2c951d24d 100755
--- a/components/lib/tree/TreeNode.vue
+++ b/components/lib/tree/TreeNode.vue
@@ -33,10 +33,10 @@
                 </template>
             </Checkbox>
             <template v-if="templates['nodeIcon']">
-              <component :is="templates['nodeIcon']" v-bind="getPTOptions('nodeIcon')" :class="cx('nodeIcon')" :node="node"></component>
+                <component :is="templates['nodeIcon']" v-bind="getPTOptions('nodeIcon')" :class="cx('nodeIcon')" :node="node"></component>
             </template>
             <template v-else>
-              <span :class="[cx('nodeIcon'), node.icon]" v-bind="getPTOptions('nodeIcon')"></span>
+                <span :class="[cx('nodeIcon'), node.icon]" v-bind="getPTOptions('nodeIcon')"></span>
             </template>
             <span :class="cx('label')" v-bind="getPTOptions('label')" @keydown.stop>
                 <component v-if="templates[node.type] || templates['default']" :is="templates[node.type] || templates['default']" :node="node" />
diff --git a/doc/common/apidoc/index.json b/doc/common/apidoc/index.json
index 585b028df..c7cee3d8a 100644
--- a/doc/common/apidoc/index.json
+++ b/doc/common/apidoc/index.json
@@ -57309,6 +57309,19 @@
                             "returnType": "VNode<RendererNode, RendererElement, Object>[]",
                             "description": "Custom toggler icon template."
                         },
+                        {
+                            "name": "nodeIcon",
+                            "parameters": [
+                                {
+                                    "name": "scope",
+                                    "optional": false,
+                                    "type": "{\n  \t <span class=\"ml-3 doc-option-parameter-name\">node</span>: <span class=\"doc-option-parameter-type\">TreeNode</span>, <span class=\"doc-option-parameter-type\">// Tree node instance</span>\n }",
+                                    "description": "togglericon slot's params."
+                                }
+                            ],
+                            "returnType": "VNode<RendererNode, RendererElement, Object>[]",
+                            "description": "Custom node icon template."
+                        },
                         {
                             "name": "checkboxicon",
                             "parameters": [