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-rw-r--r--tex/context/base/mkxl/math-fen.mkxl2
1 files changed, 1 insertions, 1 deletions
diff --git a/tex/context/base/mkxl/math-fen.mkxl b/tex/context/base/mkxl/math-fen.mkxl
index f18d72c85..2e491f28b 100644
--- a/tex/context/base/mkxl/math-fen.mkxl
+++ b/tex/context/base/mkxl/math-fen.mkxl
@@ -390,7 +390,7 @@
\newconditional\c_math_fenced_done
\newconditional\c_math_fenced_unknown \settrue\c_math_fenced_unknown
-\protected\def\installmathfencepair#1#2#3#4%
+\permanent\protected\def\installmathfencepair#1#2#3#4%
{\letcsname\??mathleft \normalmeaning#1\endcsname#2%
\letcsname\??mathright\normalmeaning#3\endcsname#4}