diff --git a/tools/keil.py b/tools/keil.py
index 2c9f239f1e2..8cd58c03994 100644
--- a/tools/keil.py
+++ b/tools/keil.py
@@ -87,12 +87,18 @@ def MDK4AddGroupForFN(ProjectFiles, parent, name, filename, project_path):
     if ProjectFiles.count(obj_name):
         name = basename + '_' + name
     ProjectFiles.append(obj_name)
-    file_name.text = name.decode(fs_encoding)
+    try: # python 2
+        file_name.text = name.decode(fs_encoding)
+    except: # python 3
+        file_name.text = name
     file_type = SubElement(file, 'FileType')
     file_type.text = '%d' % _get_filetype(name)
     file_path = SubElement(file, 'FilePath')
+    try: # python 2
+        file_path.text = path.decode(fs_encoding)
+    except: # python 3
+        file_path.text = path
 
-    file_path.text = path.decode(fs_encoding)
 
     return group