diff --git a/daemon/core/gui/validation.py b/daemon/core/gui/validation.py
index 22f12bb8b..2360ab0b0 100644
--- a/daemon/core/gui/validation.py
+++ b/daemon/core/gui/validation.py
@@ -107,7 +107,7 @@ def is_valid(self, s: str) -> bool:
         if len(s) == 0:
             return True
         for x in s:
-            if not x.isalnum() and x != "_":
+            if not x.isalnum() and x != "-":
                 return False
         return True