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-rw-r--r--src/Text/Pandoc/App.hs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/Text/Pandoc/App.hs b/src/Text/Pandoc/App.hs
index c759df46c..fc0a911ea 100644
--- a/src/Text/Pandoc/App.hs
+++ b/src/Text/Pandoc/App.hs
@@ -268,7 +268,8 @@ convertWithOpts opts = do
syntaxMap <- foldM addSyntaxMap defaultSyntaxMap
(optSyntaxDefinitions opts)
- case missingIncludes (M.elems syntaxMap) of
+ unless (null (optSyntaxDefinitions opts)) $
+ case missingIncludes (M.elems syntaxMap) of
[] -> return ()
xs -> E.throwIO $ PandocSyntaxMapError $
"Missing syntax definitions:\n" ++