Fix typo in previous rtree change

diff --git a/lisp/gnus/rtree.el b/lisp/gnus/rtree.el
index 001c6ed1de2d41e303cae79feae813a4b2960fd7..50a860a50618ceefff0b6349004af8bfc2c5893a 100644 (file)
--- a/lisp/gnus/rtree.el
+++ b/lisp/gnus/rtree.el
@@ -84,8 +84,8 @@
     (setq range (cons range range)))
   range)
 
-(define-obsolete-function-alias rtree-normalise-range
-  rtree-normalize-range "25.1")
+(define-obsolete-function-alias 'rtree-normalise-range
+  'rtree-normalize-range "25.1")
 
 (defun rtree-make (range)
   "Make an rtree from RANGE."