diff --git a/titlecase/__init__.py b/titlecase/__init__.py
index fd24431..27b25a6 100755
--- a/titlecase/__init__.py
+++ b/titlecase/__init__.py
@@ -98,7 +98,7 @@ def titlecase(text, callback=None, small_first_last=True, preserve_blank_lines=F
 
     """
     if preserve_blank_lines:
-        lines = regex.split('[\r\n]', text)
+        lines = regex.split(r'\r\n|\r|\n', text)
     else:
         lines = regex.split('[\r\n]+', text)
     processed = []
diff --git a/titlecase/tests.py b/titlecase/tests.py
index 9265ec0..ddc83d6 100644
--- a/titlecase/tests.py
+++ b/titlecase/tests.py
@@ -433,6 +433,17 @@ def test_complex_blanks(self):
         self.assertEqual(titlecase(s, preserve_blank_lines=True),
                 '\n\nLeading Blank\n\n\nMulti-Blank\n\n\n\n\nTrailing Blank\n\n')
 
+    def test_crlf_line_endings(self):
+        # A CRLF is a single line ending, not two, so it shouldn't introduce
+        # extra blank lines when preserve_blank_lines is on.
+        self.assertEqual(titlecase('a\r\nb', preserve_blank_lines=True), 'A\r\nB')
+        self.assertEqual(titlecase('Line1\r\nLine2\r\nLine3', preserve_blank_lines=True),
+                'Line1\nLine2\nLine3')
+        self.assertEqual(titlecase('Line1\r\n\r\nLine2', preserve_blank_lines=True),
+                'Line1\n\nLine2')
+        # Lone CR line endings should behave the same way as LF ones.
+        self.assertEqual(titlecase('a\rb', preserve_blank_lines=True), 'A\nB')
+
 class TestNormaliseSpaceCharacters(unittest.TestCase):
     def test_tabs(self):
         s = 'text\twith\ttabs'