diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs
index adabd302e521..efe750ecc723 100644
--- a/src/Text/Pandoc/Writers/HTML.hs
+++ b/src/Text/Pandoc/Writers/HTML.hs
@@ -356,7 +356,6 @@ pandocToHtml opts (Pandoc meta blocks) = do
                       then defField "csl-css" True .
                            (case stCslEntrySpacing st of
                               Nothing -> id
-                              Just 0  -> id
                               Just n  ->
                                 defField "csl-entry-spacing"
                                   (literal $ tshow n <> "em"))