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-rw-r--r--src/Text/Pandoc/Readers/Markdown.hs7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 88d0bf439..3feafd362 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -1811,9 +1811,10 @@ citeKey = try $ do
guard $ lastStrPos /= Just pos
suppress_author <- option False (char '-' >> return True)
char '@'
- first <- letter
- let internal p = try $ p >>~ lookAhead (letter <|> digit)
- rest <- many $ letter <|> digit <|> internal (oneOf ":.#$%&-_+?<>~/")
+ first <- letter <|> char '_'
+ let regchar = satisfy (\c -> isAlphaNum c || c == '_')
+ let internal p = try $ p >>~ lookAhead regchar
+ rest <- many $ regchar <|> internal (oneOf ":.#$%&-+?<>~/")
let key = first:rest
return (suppress_author, key)