diff --git a/FormatOpts.hs b/FormatOpts.hs
index 4759f89..dcdb4c2 100644
--- a/FormatOpts.hs
+++ b/FormatOpts.hs
@@ -28,4 +28,4 @@ plainWriteOpts = def {writerWrapText = WrapNone}
 
 -- | Default options for making tables of contents with certain depth.
 tocWriteOpts :: Int -> WriterOptions
-tocWriteOpts n = def { writerTOCDepth = n}
+tocWriteOpts n = def {writerTOCDepth = n}