diff --git a/guix/deprecation.scm b/guix/deprecation.scm
index 8d9e42758d..2f7c058940 100644
--- a/guix/deprecation.scm
+++ b/guix/deprecation.scm
@@ -33,7 +33,7 @@
 
 (define deprecation-warning-port
   ;; Port where deprecation warnings go.
-  (make-parameter (current-warning-port)))
+  (make-parameter (current-error-port)))
 
 (define (source-properties->location-string properties)
   "Return a human-friendly, GNU-standard representation of PROPERTIES, a