diff --git a/server/helpers/page.js b/server/helpers/page.js
index 65837b16..24d8d935 100644
--- a/server/helpers/page.js
+++ b/server/helpers/page.js
@@ -89,5 +89,18 @@ module.exports = {
     } else {
       return false
     }
+  },
+  /**
+   * Get file extension from content type
+   */
+  getFileExtension(contentType) {
+    switch (contentType) {
+      case 'markdown':
+        return 'md'
+      case 'html':
+        return 'html'
+      default:
+        return 'txt'
+    }
   }
 }
diff --git a/server/models/pages.js b/server/models/pages.js
index f39cd94f..6d538838 100644
--- a/server/models/pages.js
+++ b/server/models/pages.js
@@ -159,14 +159,7 @@ module.exports = class Page extends Model {
    * @returns {string} File Extension
    */
   getFileExtension() {
-    switch (this.contentType) {
-      case 'markdown':
-        return 'md'
-      case 'html':
-        return 'html'
-      default:
-        return 'txt'
-    }
+    return pageHelper.getFileExtension(this.contentType)
   }
 
   /**
diff --git a/server/modules/storage/git/storage.js b/server/modules/storage/git/storage.js
index 9e3d44a3..d175fdbf 100644
--- a/server/modules/storage/git/storage.js
+++ b/server/modules/storage/git/storage.js
@@ -349,7 +349,7 @@ module.exports = {
       new stream.Transform({
         objectMode: true,
         transform: async (page, enc, cb) => {
-          let fileName = `${page.path}.${page.getFileExtension()}`
+          let fileName = `${page.path}.${pageHelper.getFileExtension(page.contentType)}`
           if (WIKI.config.lang.namespacing && WIKI.config.lang.code !== page.localeCode) {
             fileName = `${page.localeCode}/${fileName}`
           }