1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/calc/calc-stuff.el b/lisp/calc/calc-stuff.el
index c6e8d8bbf27..0564e39ed57 100644
--- a/lisp/calc/calc-stuff.el
+++ b/lisp/calc/calc-stuff.el
@@ -171,6 +171,7 @@ With a prefix, push that prefix as a number onto the stack."
 (defvar math-max-digits-cache) ; calc-bin.el
 (defvar math-integral-cache) ; calcalg2.el
 (defvar math-units-table) ; calc-units.el
+(defvar math-decls-cache-tag) ; calc-arith.el
 (defvar math-format-date-cache) ; calc-forms.el
 (defvar math-holidays-cache-tag) ; calc-forms.el