diff --git a/ChangeLog b/ChangeLog
index c3d472f738..9719292bb7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Sep 13 14:27:47 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
+
+	* string.c, missing.h: failed to build on powerpc-apple-darwin7.9.0
+	  because of crypt argument's constness mismatch. (I hope this works)
+	  (http://mput.dip.jp/autobuild/ruby-trunk/log/20050913T110001.gz)
+
 Tue Sep 13 12:33:05 2005    <why@ruby-lang.org>
 
 	* lib/yaml.rb: reworking YAML::Stream to use the new
diff --git a/missing.h b/missing.h
index a4616950e3..cb4f12a121 100644
--- a/missing.h
+++ b/missing.h
@@ -32,7 +32,7 @@ extern double atanh _((double));
 #endif
 
 #ifndef HAVE_CRYPT
-extern char *crypt _((char *, char *));
+extern char *crypt _((const char *, const char *));
 #endif
 
 #ifndef HAVE_DUP2
diff --git a/string.c b/string.c
index fe27fd4c2f..750e920bbf 100644
--- a/string.c
+++ b/string.c
@@ -4141,7 +4141,7 @@ rb_str_oct(VALUE str)
 static VALUE
 rb_str_crypt(VALUE str, VALUE salt)
 {
-    extern char *crypt(char *, char *);
+    extern char *crypt(const char *, const char *);
     VALUE result;
     char *s;