1 files changed, 2 insertions, 2 deletions
diff --git a/lib/documents.js b/lib/documents.js
index f1ce08b..986cd9c 100644
--- a/lib/documents.js
+++ b/lib/documents.js
@@ -10,7 +10,7 @@ function Paragraph(children, properties) {
     return {
         type: "paragraph",
         children: children,
-        styleName: properties.styleName
+        styleName: properties.styleName || null
     };
 }
 
@@ -19,7 +19,7 @@ function Run(children, properties) {
     return {
         type: "run",
         children: children,
-        styleName: properties.styleName,
+        styleName: properties.styleName || null,
         isBold: properties.isBold,
         isItalic: properties.isItalic
     };