diff --git a/ChangeLog b/ChangeLog
index 5e9178cbf8..d61ae76635 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Aug  4 10:27:22 2003  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* util.h: remove unnecessary parentheses.  [ruby-dev:20879]
+
 Mon Aug  4 10:00:47 2003  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* lib/net/imap.rb (receive_responses): raise exception to
diff --git a/util.h b/util.h
index 4c470f363e..a0999ca872 100644
--- a/util.h
+++ b/util.h
@@ -41,7 +41,6 @@ unsigned long scan_hex _((const char*, int, int*));
 
 #if defined(MSDOS) || defined(__CYGWIN32__) || defined(_WIN32)
 void ruby_add_suffix();
-#define add_suffix ruby_add_suffix
 #endif
 
 void ruby_qsort _((void*, const int, const int, int (*)()));
@@ -51,17 +50,17 @@ void ruby_setenv _((const char*, const char*));
 void ruby_unsetenv _((const char*));
 #undef setenv
 #undef unsetenv
-#define setenv(name,val) ruby_setenv((name),(val))
-#define unsetenv(name,val) ruby_unsetenv((name));
+#define setenv(name,val) ruby_setenv(name,val)
+#define unsetenv(name,val) ruby_unsetenv(name);
 
 char *ruby_strdup _((const char*));
 #undef strdup
-#define strdup(s) ruby_strdup((s))
+#define strdup(s) ruby_strdup(s)
 
 char *ruby_getcwd _((void));
 #define my_getcwd() ruby_getcwd()
 
 double ruby_strtod _((const char*, char **));
-#define strtod(s,e) ruby_strtod((s),(e))
+#define strtod(s,e) ruby_strtod(s,e)
 
 #endif /* UTIL_H */