diff --git a/ChangeLog b/ChangeLog
index acbd685429..41bb3b5926 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Dec 10 23:37:51 2001  Usaku Nakamura  <usa@ruby-lang.org>
+
+	* util.h: change prototype of ruby_qsort() to accord with its
+	  definition.
+
 Mon Dec 10 02:09:28 2001  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* array.c (rb_ary_modify): should copy the internal buffer if the
diff --git a/util.h b/util.h
index ba408359a9..60e0ff4f60 100644
--- a/util.h
+++ b/util.h
@@ -36,7 +36,7 @@ void ruby_add_suffix();
 #define add_suffix ruby_add_suffix
 #endif
 
-void ruby_qsort _((void*, int, int, int (*)()));
+void ruby_qsort _((void*, const int, const int, int (*)()));
 #define qsort(b,n,s,c) ruby_qsort(b,n,s,c)
 
 void ruby_setenv _((const char*, const char*));