diff --git a/src/calibre/ebooks/txt/input.py b/src/calibre/ebooks/txt/input.py
index 7253596801..60adf4bd7a 100644
--- a/src/calibre/ebooks/txt/input.py
+++ b/src/calibre/ebooks/txt/input.py
@@ -12,7 +12,7 @@ from calibre.ebooks.chardet import detect
 from calibre.ebooks.txt.processor import convert_basic, convert_markdown, \
     separate_paragraphs_single_line, separate_paragraphs_print_formatted, \
     preserve_spaces, detect_paragraph_type, detect_formatting_type, \
-    normalize_line_endings, convert_textile, remove_indents
+    normalize_line_endings, convert_textile, remove_indents, block_to_single_line
 from calibre import _ent_pat, xml_entity_to_unicode
 
 class TXTInput(InputFormatPlugin):
@@ -106,6 +106,7 @@ class TXTInput(InputFormatPlugin):
             txt = separate_paragraphs_single_line(txt)
         elif options.paragraph_type == 'print':
             txt = separate_paragraphs_print_formatted(txt)
+            txt = block_to_single_line(txt)
         elif options.paragraph_type == 'unformatted':
             from calibre.ebooks.conversion.utils import HeuristicProcessor
             # unwrap lines based on punctuation
@@ -114,6 +115,8 @@ class TXTInput(InputFormatPlugin):
             preprocessor = HeuristicProcessor(options, log=getattr(self, 'log', None))
             txt = preprocessor.punctuation_unwrap(length, txt, 'txt')
             txt = separate_paragraphs_single_line(txt)
+        else:
+            txt = block_to_single_line(txt)
 
         if getattr(options, 'enable_heuristics', False) and getattr(options, 'dehyphenate', False):
             docanalysis = DocAnalysis('txt', txt)
diff --git a/src/calibre/ebooks/txt/processor.py b/src/calibre/ebooks/txt/processor.py
index ebbdc9eb07..e4e7772ce7 100644
--- a/src/calibre/ebooks/txt/processor.py
+++ b/src/calibre/ebooks/txt/processor.py
@@ -99,7 +99,11 @@ def separate_paragraphs_single_line(txt):
     return txt
 
 def separate_paragraphs_print_formatted(txt):
-    txt = re.sub(u'(?miu)^(?P<indent>\t+|[ ]{2,})(?=.)', lambda mo: '%s\n\t' % mo.group('indent'), txt)
+    txt = re.sub(u'(?miu)^(?P<indent>\t+|[ ]{2,})(?=.)', lambda mo: '\n%s' % mo.group('indent'), txt)
+    return txt
+
+def block_to_single_line(txt):
+    txt = re.sub(r'(?<=.)\n(?=.)', ' ', txt)
     return txt
 
 def preserve_spaces(txt):