diff --git a/lib/actions/file.js b/lib/actions/file.js
index 70bd6ed..93b6199 100644
--- a/lib/actions/file.js
+++ b/lib/actions/file.js
@@ -171,6 +171,7 @@ exports.listFileVersions = function(b2, args) {
     const startFileName = args.startFileName;
     const startFileId = args.startFileId;
     const maxFileCount = args.maxFileCount;
+    const prefix = args.prefix
 
     const options = {
         url: endpoints(b2).listFileVersionsUrl,
@@ -180,7 +181,8 @@ exports.listFileVersions = function(b2, args) {
             bucketId: bucketId,
             startFileName: startFileName || '',
             startFileId: startFileId,
-            maxFileCount: maxFileCount || 100
+            maxFileCount: maxFileCount || 100,
+            prefix:prefix,
         }
     };