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-rw-r--r--tex/context/base/math-fen.mkiv10
1 files changed, 8 insertions, 2 deletions
diff --git a/tex/context/base/math-fen.mkiv b/tex/context/base/math-fen.mkiv
index 6c29a8c18..d754bd672 100644
--- a/tex/context/base/math-fen.mkiv
+++ b/tex/context/base/math-fen.mkiv
@@ -538,8 +538,14 @@
\newconditional\c_math_fences_auto
-\unexpanded\def\enableautofences {\settrue \c_math_fences_auto}
-\unexpanded\def\disableautofences{\setfalse\c_math_fences_auto}
+\unexpanded\def\enableautofences
+ {\clf_enableautofences
+ \glet\clf_enableautofences\relax % onlyonce anyway
+ \unexpanded\gdef\enableautofences{\settrue\c_math_fences_auto}%
+ \enableautofences}
+
+\unexpanded\def\disableautofences
+ {\setfalse\c_math_fences_auto}
\unexpanded\def\math_fences_used_left
{\ifconditional\c_math_fences_auto