diff --git a/src/Mod/Arch/importIFC.py b/src/Mod/Arch/importIFC.py
index caa8369496..eff4daf6a7 100644
--- a/src/Mod/Arch/importIFC.py
+++ b/src/Mod/Arch/importIFC.py
@@ -1942,7 +1942,7 @@ def export(exportList,filename):
                                 val = sheet.get('D'+str(n))
                             else:
                                 val = ''
-                            if six.py2 and isinstance(key, six.text_type):
+                            if six.PY2 and isinstance(key, six.text_type):
                                 key = key.encode("utf8")
                             else:
                                 key = str(key)