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-rw-r--r--src/compiler/generic/utils.lisp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/compiler/generic/utils.lisp b/src/compiler/generic/utils.lisp
index 33a1840b9..118ba1b60 100644
--- a/src/compiler/generic/utils.lisp
+++ b/src/compiler/generic/utils.lisp
@@ -441,7 +441,7 @@
;;; Convert # of "big digits" (= words, sometimes called "limbs") to a header value.
(defmacro bignum-header-for-length (n)
- (logior (ash n n-widetag-bits) bignum-widetag))
+ `(logior (ash ,n n-widetag-bits) bignum-widetag))
(defmacro id-bits-offset ()
(let ((slot (get-dsd-index layout sb-kernel::id-word0)))