1 files changed, 1 insertions, 1 deletions
diff --git a/BibTeX.py b/BibTeX.py
index 3aa9615..05b2dc6 100644
--- a/BibTeX.py
+++ b/BibTeX.py
@@ -619,7 +619,7 @@ def TeXescapeURL(s):
 RE_LONE_AMP = re.compile(r'&([^a-z0-9])')
 RE_LONE_I = re.compile(r'\\i([^a-z0-9])')
 RE_ACCENT = re.compile(r'\\([\'`~^"c])([^{]|{.})')
-RE_LIGATURE = re.compile(r'\\(AE|ae|OE|oe|AA|aa|O|o|ss|)([^a-z0-9])')
+RE_LIGATURE = re.compile(r'\\(AE|ae|OE|oe|AA|aa|O|o|ss)([^a-z0-9])')
 ACCENT_MAP = { "'" : 'acute',
                "`" : 'grave',
                "~" : 'tilde',