diff --git a/lib/mixins/markings.js b/lib/mixins/markings.js
index 278ac7f7..589b7889 100644
--- a/lib/mixins/markings.js
+++ b/lib/mixins/markings.js
@@ -14,7 +14,8 @@ export default {
     this.structChildren = [];
 
     if (options.tagged) {
-      this.getMarkingsDictionary().data.Marked = true;
+      this.getMarkInfoDictionary().data.Marked = true;
+      this.getStructTreeRoot();
     }
   },
 
@@ -130,17 +131,17 @@ export default {
     return pageMarkings;
   },
 
-  getMarkingsDictionary() {
-    if (!this._root.data.Markings) {
-      this._root.data.Markings = this.ref({});
+  getMarkInfoDictionary() {
+    if (!this._root.data.MarkInfo) {
+      this._root.data.MarkInfo = this.ref({});
     }
-    return this._root.data.Markings;
+    return this._root.data.MarkInfo;
   },
 
   getStructTreeRoot() {
     if (!this._root.data.StructTreeRoot) {
       this._root.data.StructTreeRoot = this.ref({
-        Type: "StructTreeRoot",
+        Type: 'StructTreeRoot',
         ParentTree: new PDFNumberTree(),
         ParentTreeNextKey: 0
       });
@@ -153,8 +154,8 @@ export default {
   },
 
   createStructParentTreeNextKey() {
-    // initialise the Markings dictionary
-    this.getMarkingsDictionary();
+    // initialise the MarkInfo dictionary
+    this.getMarkInfoDictionary();
 
     const structTreeRoot = this.getStructTreeRoot();
     const key = structTreeRoot.data.ParentTreeNextKey++;
@@ -168,8 +169,8 @@ export default {
       structTreeRoot.end();
       this.structChildren.forEach((structElem) => structElem.end());
     }
-    if (this._root.data.Markings) {
-      this._root.data.Markings.end();
+    if (this._root.data.MarkInfo) {
+      this._root.data.MarkInfo.end();
     }
   }
 
diff --git a/tests/unit/markings.spec.js b/tests/unit/markings.spec.js
index acc88a42..845372f9 100644
--- a/tests/unit/markings.spec.js
+++ b/tests/unit/markings.spec.js
@@ -289,7 +289,7 @@ EMC
       ]);
       expect(docData).toContainChunk([
         `3 0 obj`,
-        /\/Markings 9 0 R/,
+        /\/MarkInfo 9 0 R/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
@@ -369,7 +369,7 @@ EMC
       ]);
       expect(docData).toContainChunk([
         `3 0 obj`,
-        /\/Markings 9 0 R/,
+        /\/MarkInfo 9 0 R/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
@@ -441,7 +441,7 @@ EMC
       ]);
       expect(docData).toContainChunk([
         `3 0 obj`,
-        /\/Markings 13 0 R/,
+        /\/MarkInfo 13 0 R/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
@@ -569,7 +569,7 @@ EMC
       ]);
       expect(docData).toContainChunk([
         `3 0 obj`,
-        /\/Markings 5 0 R/,
+        /\/MarkInfo 5 0 R/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
@@ -579,26 +579,47 @@ EMC
       ]);
       expect(docData).toContainChunk([
         `3 0 obj`,
-        /\/ViewerPreferences 6 0 R/,
+        /\/ViewerPreferences 7 0 R/,
         `endobj`
       ]);
+
+      expect(docData).toContainChunk([
+        `3 0 obj`,
+        /\/StructTreeRoot 6 0 R/,
+        `endobj`
+      ]);
+
       expect(docData).toContainChunk([
         `6 0 obj`,
+        `<<
+/Type /StructTreeRoot
+/ParentTree <<
+  /Nums [
+]
+>>
+/ParentTreeNextKey 0
+>>`,
+        `endobj`
+      ]);
+
+
+      expect(docData).toContainChunk([
+        `7 0 obj`,
         /\/DisplayDocTitle true/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
         `trailer`,
-        /\/Info 10 0 R/,
+        /\/Info 11 0 R/,
         `startxref`
       ]);
       expect(docData).toContainChunk([
-        `10 0 obj`,
-        /\/Title 14 0 R/,
+        `11 0 obj`,
+        /\/Title 15 0 R/,
         `endobj`
       ]);
       expect(docData).toContainChunk([
-        `14 0 obj`,
+        `15 0 obj`,
         `(My Title)`,
         `endobj`
       ]);