diff --git a/src/Mod/Start/StartPage/StartPage.py b/src/Mod/Start/StartPage/StartPage.py
index 89a30e4e4f..6b11905a0c 100644
--- a/src/Mod/Start/StartPage/StartPage.py
+++ b/src/Mod/Start/StartPage/StartPage.py
@@ -109,8 +109,8 @@ def getInfo(filename):
             import gnomevfs
         except Exception:
             # alternative method
-            import hashlib
-            fhash = hashlib.md5(("file://"+path).encode("utf8")).hexdigest()
+            import hashlib, urllib
+            fhash = hashlib.md5(urllib.quote("file://"+path,safe=":/")).hexdigest()
             thumb = os.path.join(os.path.expanduser("~"),".thumbnails","normal",fhash+".png")
         else:
             uri = gnomevfs.get_uri_from_local_path(path)