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-rw-r--r--tex/context/base/mkxl/math-dif.mkxl4
1 files changed, 2 insertions, 2 deletions
diff --git a/tex/context/base/mkxl/math-dif.mkxl b/tex/context/base/mkxl/math-dif.mkxl
index ad53ee25a..4c1117726 100644
--- a/tex/context/base/mkxl/math-dif.mkxl
+++ b/tex/context/base/mkxl/math-dif.mkxl
@@ -19,8 +19,8 @@
% For new times sake:
- \let\normal_math_dd\dd
- \let\normal_math_DD\DD
+ \ifdefined\dd \aliased\let\normal_math_dd\dd \else \lettonothing\normal_math_dd \fi
+ \ifdefined\DD \aliased\let\normal_math_DD\DD \else \lettonothing\normal_math_DD \fi
\def\c!differentiald{differentiald} % for now