diff --git a/ChangeLog b/ChangeLog
index 3a2b9ad61b..6ed449c177 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,11 @@
-Tue Aug 30 16:19:40 005	  Keiju Ishitsuka <keiju@ruby-lang.org>
+Tue Aug 30 19:34:27 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
+
+	* ext/digest/md5/md5ossl.h, ext/digest/rmd160/rmd160ossl.h,
+	  ext/digest/sha1/sha1ossl.h: include <stddef.h> to avoid
+	  error in compilation with OpenSSL-0.9.8. [ruby-list:41068]
+
+Tue Aug 30 16:19:40 2005  Keiju Ishitsuka <keiju@ruby-lang.org>
+
 	* lib/irb/init.rb: bug fix. [ruby-dev: 26920]
 
 Tue Aug 30 12:45:15 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
diff --git a/ext/digest/md5/md5ossl.h b/ext/digest/md5/md5ossl.h
index dda7c743ed..610f58db06 100644
--- a/ext/digest/md5/md5ossl.h
+++ b/ext/digest/md5/md5ossl.h
@@ -3,6 +3,7 @@
 #ifndef MD5OSSL_H_INCLUDED
 #define MD5OSSL_H_INCLUDED
 
+#include <stddef.h>
 #include <openssl/md5.h>
 
 void MD5_End(MD5_CTX *pctx, unsigned char *hexdigest);
diff --git a/ext/digest/rmd160/rmd160ossl.h b/ext/digest/rmd160/rmd160ossl.h
index 824a1bf32f..e8928d164b 100644
--- a/ext/digest/rmd160/rmd160ossl.h
+++ b/ext/digest/rmd160/rmd160ossl.h
@@ -3,6 +3,7 @@
 #ifndef RMD160OSSL_H_INCLUDED
 #define RMD160OSSL_H_INCLUDED
 
+#include <stddef.h>
 #include <openssl/ripemd.h>
 
 #define RMD160_CTX	RIPEMD160_CTX
diff --git a/ext/digest/sha1/sha1ossl.h b/ext/digest/sha1/sha1ossl.h
index e8d7e74baf..c271cc47c6 100644
--- a/ext/digest/sha1/sha1ossl.h
+++ b/ext/digest/sha1/sha1ossl.h
@@ -3,6 +3,7 @@
 #ifndef SHA1OSSL_H_INCLUDED
 #define SHA1OSSL_H_INCLUDED
 
+#include <stddef.h>
 #include <openssl/sha.h>
 
 #define SHA1_CTX	SHA_CTX