diff --git a/libraries/entropy/tools.py b/libraries/entropy/tools.py
index 95bc9595f..64c1a0116 100644
--- a/libraries/entropy/tools.py
+++ b/libraries/entropy/tools.py
@@ -2563,7 +2563,7 @@ def is_valid_string(string):
     if invalid: return False
     return True
 
-valid_path_regexp = re.compile("^([A-Za-z0-9/\.:-_]+)$")
+valid_path_regexp = re.compile("^([A-Za-z0-9/\.:\-_]+)$")
 def is_valid_path_string(path):
     """
     Return whether given path is a valid path string (whitelisting valid