diff --git a/src/mudlib/zmachine/trivialzui.py b/src/mudlib/zmachine/trivialzui.py
index 4f3934c..f4aeb11 100644
--- a/src/mudlib/zmachine/trivialzui.py
+++ b/src/mudlib/zmachine/trivialzui.py
@@ -374,6 +374,7 @@ def _read_line(original_text=None, terminating_characters=None):
             char_to_print = char
 
         sys.stdout.write(char_to_print)
+        sys.stdout.flush()
     return string