diff -pruN uim-1.5.7.orig/emacs/uim.el uim-1.5.7/emacs/uim.el
--- uim-1.5.7.orig/emacs/uim.el	2009-11-22 20:43:02.000000000 +0900
+++ uim-1.5.7/emacs/uim.el	2010-03-15 19:36:35.000000000 +0900
@@ -552,11 +552,13 @@
 (defun uim-update-imlist (imlist)
   (setq uim-im-alist 
 	(mapcar '(lambda (x) 
-		   (let ((im (nth 0 x))
-			 (lang-uim (nth 2 x)))
-		     (cons im
-			   (or (assoc lang-uim uim-lang-code-alist)
-			       (assoc "Other" uim-lang-code-alist)))))
+		   (let* ((im (nth 0 x))
+			  (lang-uim (nth 2 x))
+			  (entry (or (assoc lang-uim uim-lang-code-alist)
+				     (assoc "Other" uim-lang-code-alist))))
+		     (cons im (if (string-match ".*utf8" im)
+				  (list (car entry) (cadr entry) 'utf-8 "UTF-8")
+				entry))))
 		imlist))
   )