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-rw-r--r--tex/context/base/mkxl/buff-ver.mkxl4
1 files changed, 2 insertions, 2 deletions
diff --git a/tex/context/base/mkxl/buff-ver.mkxl b/tex/context/base/mkxl/buff-ver.mkxl
index 7d193553c..11ad92784 100644
--- a/tex/context/base/mkxl/buff-ver.mkxl
+++ b/tex/context/base/mkxl/buff-ver.mkxl
@@ -448,8 +448,8 @@
%D The basic display verbatim commands are defined in an indirect way. As we
%D will see, they are a specific case of a more general mechanism.
-\let\beginofverbatimlines\relax % hooks
-\let\endofverbatimlines \relax % hooks
+\mutable\let\beginofverbatimlines\relax % hooks
+\mutable\let\endofverbatimlines \relax % hooks
\protected\def\buff_verbatim_typing_start#1% tricky non standard lookahead
{\begingroup