diff --git a/src/calibre/ebooks/conversion/utils.py b/src/calibre/ebooks/conversion/utils.py
index f367aa02d7..5db920b01d 100644
--- a/src/calibre/ebooks/conversion/utils.py
+++ b/src/calibre/ebooks/conversion/utils.py
@@ -194,7 +194,7 @@ class PreProcessor(object):
         totalwords = 0
         totalwords = self.get_word_count(html)
 
-        if totalwords < 20:
+        if totalwords < 50:
             self.log("not enough text, not preprocessing")
             return html