diff --git a/src/calibre/ebooks/rtf/input.py b/src/calibre/ebooks/rtf/input.py
index 92ac8a2519..2f931d1d04 100644
--- a/src/calibre/ebooks/rtf/input.py
+++ b/src/calibre/ebooks/rtf/input.py
@@ -320,11 +320,10 @@ class RTFInput(InputFormatPlugin):
res = transform.tostring(result)
res = res[:100].replace('xmlns:html', 'xmlns') + res[100:]
# Replace newlines inserted by the 'empty_paragraphs' option in rtf2xml with html blank lines
- if not getattr(self.opts, 'remove_paragraph_spacing', False):
- res = re.sub('\s*', '', res)
- res = re.sub('(?<=\n)\n{2}',
- u'\u00a0
\n'.encode('utf-8'), res)
- if self.opts.preprocess_html:
+ res = re.sub('\s*', '', res)
+ res = re.sub('(?<=\n)\n{2}',
+ u'\u00a0
\n'.encode('utf-8'), res)
+ if self.opts.enable_heuristics:
preprocessor = PreProcessor(self.opts, log=getattr(self, 'log', None))
res = preprocessor(res.decode('utf-8')).encode('utf-8')
f.write(res)