1 files changed, 5 insertions, 0 deletions
diff --git a/Mailman/Gui/GUIBase.py b/Mailman/Gui/GUIBase.py
index 19714e1c..a365acaf 100644
--- a/Mailman/Gui/GUIBase.py
+++ b/Mailman/Gui/GUIBase.py
@@ -99,6 +99,11 @@ class GUIBase:
             return val
         # This is a number, either a float or an integer
         if wtype == mm_cfg.Number:
+            # The int/float code below doesn't work if we are called from
+            # config_list with a value that is already a float.  It will
+            # truncate the value to an int.
+            if isinstance(val, float):
+                return val
             num = -1
             try:
                 num = int(val)