diff --git a/ChangeLog b/ChangeLog
index 5c8a9c5e..092f36f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2010-04-25  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	i18n: fix untranslatable string.
+	Reported by Goran Uddeborg at
+	<http://lists.gnu.org/archive/html/bug-bison/2010-03/msg00000.html>.
+	* src/muscle-tab.c (muscle_percent_define_insert): Here.
+
 2010-04-13  Akim Demaille  <demaille@gostai.com>
 
 	tests: calc: minor refactoring.
diff --git a/src/muscle-tab.c b/src/muscle-tab.c
index 08383a6d..5ab5f9b8 100644
--- a/src/muscle-tab.c
+++ b/src/muscle-tab.c
@@ -425,8 +425,8 @@ muscle_percent_define_insert (char const *variable, location variable_loc,
           free (variable_tr);
           return;
         }
-      complain_at (variable_loc, _("%s `%s' redefined"),
-                   "%define variable", variable);
+      complain_at (variable_loc, _("%%define variable `%s' redefined"),
+                   variable);
       complain_at (muscle_percent_define_get_loc (variable),
                    _("previous definition"));
     }