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-rw-r--r--ice-9/boot-9.scm5
1 files changed, 4 insertions, 1 deletions
diff --git a/ice-9/boot-9.scm b/ice-9/boot-9.scm
index 71bc2bff0..81b3ee3bb 100644
--- a/ice-9/boot-9.scm
+++ b/ice-9/boot-9.scm
@@ -83,7 +83,10 @@
(and (memq feature *features*) #t))
(begin-deprecated
- (define feature? provided?))
+ (define (feature? sym)
+ (issue-deprecation-warning
+ "`feature?' is deprecated. Use `provided?' instead.")
+ (provided? sym)))
;;; let format alias simple-format until the more complete version is loaded
(define format simple-format)