diff --git a/apps/enm/services.py b/apps/enm/services.py
index f4dc519c..eb2f1397 100644
--- a/apps/enm/services.py
+++ b/apps/enm/services.py
@@ -64,7 +64,7 @@ def get_can_save_from_save_expr(expr_str: str, self_val) -> bool:
             if current_val is None:
                 return True
             else:
-                expr_str = expr_str.replace(f"{{{match}}}", current_val)
+                expr_str = expr_str.replace(f"{{{match}}}", str(current_val))
     try:
         rval = eval(expr_str)
     except Exception as e: