diff --git a/invesalius/gui/frame.py b/invesalius/gui/frame.py
index a716825..22b04f8 100755
--- a/invesalius/gui/frame.py
+++ b/invesalius/gui/frame.py
@@ -19,6 +19,7 @@
 
 import math
 import os.path
+import platform
 import sys
 import webbrowser
 
--
libgit2 0.21.2