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-rw-r--r--tex/context/base/mkiv/supp-vis.mkiv4
1 files changed, 3 insertions, 1 deletions
diff --git a/tex/context/base/mkiv/supp-vis.mkiv b/tex/context/base/mkiv/supp-vis.mkiv
index de7c4288d..8b9420162 100644
--- a/tex/context/base/mkiv/supp-vis.mkiv
+++ b/tex/context/base/mkiv/supp-vis.mkiv
@@ -1415,7 +1415,9 @@
{\dontinterfere
\dontcomplain
\setbox\boxrulescratchbox\normalhbox
- {$\normalmkern\ifnegative-\fi\scratchskip$}%
+ {\normalstartimath
+ \normalmkern\ifnegative-\fi\scratchskip
+ \normalstopimath}%
\setbox\boxrulescratchbox\normalhbox to \wd\boxrulescratchbox
{\visualvrule
\s!height16\testrulewidth