diff --git a/sopel_modules/SpiceBot/osd.py b/sopel_modules/SpiceBot/osd.py
index e665e62..2b86ad7 100644
--- a/sopel_modules/SpiceBot/osd.py
+++ b/sopel_modules/SpiceBot/osd.py
@@ -97,7 +97,7 @@ class ToolsOSD:
         except AttributeError:
             hostmaskbytes = (len((bot.nick).encode('utf-8'))  # Bot's NICKLEN
                              + 1  # (! separator)
-                             + 1  # (for the optional ~ in user)
+                             + len('~')  # (for the optional ~ in user)
                              + 9  # max username length (was 12)
                              + 1  # (@ separator)
                              + 63  # <hostname> has a maximum length of 63 characters.