diff --git a/src/calibre/ebooks/lit/writer.py b/src/calibre/ebooks/lit/writer.py
index 45425c9a2d..f4e9c9a497 100644
--- a/src/calibre/ebooks/lit/writer.py
+++ b/src/calibre/ebooks/lit/writer.py
@@ -164,7 +164,7 @@ class ReBinary:
                 try:
                     value = codepoint_to_chr(value)
                 except OverflowError:
-                    self.logger.warn('unicode_type overflow for integer:', value)
+                    self.logger.warn('Unicode overflow for integer:', value)
                     value = u'?'
             self.buf.write(value.encode('utf-8'))