diff --git a/Orange/canvas/application/canvasmain.py b/Orange/canvas/application/canvasmain.py
index 8f1091dca72..a01afc0600b 100644
--- a/Orange/canvas/application/canvasmain.py
+++ b/Orange/canvas/application/canvasmain.py
@@ -1170,6 +1170,8 @@ def save_scheme_as(self):
         document = self.current_document()
         curr_scheme = document.scheme()
         title = curr_scheme.title or "untitled"
+        for illegal in r'<>:"\/|?*\0':
+            title = title.replace(illegal, '_')
 
         if document.path():
             start_dir = document.path()