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-rw-r--r--pygments/lexers/__init__.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pygments/lexers/__init__.py b/pygments/lexers/__init__.py
index a0a5b8a9..33f8a11f 100644
--- a/pygments/lexers/__init__.py
+++ b/pygments/lexers/__init__.py
@@ -84,7 +84,7 @@ def get_lexer_by_name(_alias, **options):
"""
# lookup builtin lexers
for module_name, name, aliases, _, _ in LEXERS.itervalues():
- if _alias in aliases:
+ if _alias.lower() in aliases:
if name not in _lexer_cache:
_load_lexers(module_name)
return _lexer_cache[name](**options)