diff --git a/src/Text/Pandoc/Readers/MediaWiki.hs b/src/Text/Pandoc/Readers/MediaWiki.hs
index 06e31cfab090..c74a5a47b642 100644
--- a/src/Text/Pandoc/Readers/MediaWiki.hs
+++ b/src/Text/Pandoc/Readers/MediaWiki.hs
@@ -276,7 +276,7 @@ cellsep = try $ do
   skipMany spaceChar
   c <- oneOf "|!"
   when (col > 1) $ void $ char c
-  notFollowedBy (oneOf "-}+")
+  notFollowedBy (oneOf "-}")
   attribs <- option [] (parseAttrs <* skipMany spaceChar <* char '|')
   skipMany spaceChar
   pure attribs
diff --git a/test/command/10491.md b/test/command/10491.md
new file mode 100644
index 000000000000..0647d5f179d2
--- /dev/null
+++ b/test/command/10491.md
@@ -0,0 +1,35 @@
+```
+% pandoc -f mediawiki -t gfm
+{| class="wikitable"
+|-
+!
+!0
+!1
+!2
+!3
+!4
+!5
+!6
+!7
+|-
+!+0
+|q||p||z||r||y||9||x||8
+|-
+!+8
+|g||f||2||t||v||d||w||0
+|-
+!+16
+|s||3||j||n||5||4||k||h
+|-
+!+24
+|c||e||6||m||u||a||7||l
+|}
+^D
+|     | 0   | 1   | 2   | 3   | 4   | 5   | 6   | 7   |
+|-----|-----|-----|-----|-----|-----|-----|-----|-----|
+| +0  | q   | p   | z   | r   | y   | 9   | x   | 8   |
+| +8  | g   | f   | 2   | t   | v   | d   | w   | 0   |
+| +16 | s   | 3   | j   | n   | 5   | 4   | k   | h   |
+| +24 | c   | e   | 6   | m   | u   | a   | 7   | l   |
+
+```