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-rw-r--r--src/Text/Pandoc/Readers/Markdown.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 7e3b1afc3..ae682e72e 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -362,7 +362,7 @@ attribute = identifierAttr <|> classAttr <|> keyValAttr
identifier :: GenParser Char st [Char]
identifier = do
first <- letter
- rest <- many alphaNum
+ rest <- many $ alphaNum <|> oneOf "-_:."
return (first:rest)
identifierAttr :: GenParser Char st ([Char], [a], [a1])