diff --git a/ChangeLog b/ChangeLog
index 4bbc94c956..109f93a9f4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Oct 27 11:53:17 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
+
+	* missing.h, missing/memcmp.c, missing/memmove.c:
+	  ANSI compatible interface.
+
 Wed Oct 26 09:15:48 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* ext/syck/implicit.c (syck_type_id_to_uri): should return
diff --git a/missing.h b/missing.h
index 675d0d5e17..5b4dcc2747 100644
--- a/missing.h
+++ b/missing.h
@@ -76,12 +76,12 @@ extern int isnan(double);
 
 /*
 #ifndef HAVE_MEMCMP
-extern int memcmp(char *, char *, int);
+extern int memcmp(const void *, const void *, size_t);
 #endif
 */
 
 #ifndef HAVE_MEMMOVE
-extern void *memmove(void *, void *, int);
+extern void *memmove(void *, const void *, size_t);
 #endif
 
 /*
diff --git a/missing/memcmp.c b/missing/memcmp.c
index 9edc9c13b9..5b3ad3817a 100644
--- a/missing/memcmp.c
+++ b/missing/memcmp.c
@@ -1,16 +1,15 @@
 /* public domain rewrite of memcmp(3) */
 
+#include <stddef.h>
+
 int
-memcmp(s1,s2,len)
-    char *s1;
-    char *s2;
-    register int len;
+memcmp(const void *s1, const void *s2, size_t len)
 {
     register unsigned char *a = (unsigned char*)s1;
     register unsigned char *b = (unsigned char*)s2;
     register int tmp;
 
-    while (len--) {
+    for (; len; --len) {
 	if (tmp = *a++ - *b++)
 	    return tmp;
     }
diff --git a/missing/memmove.c b/missing/memmove.c
index c9d67d8b45..19c5f18847 100644
--- a/missing/memmove.c
+++ b/missing/memmove.c
@@ -1,22 +1,21 @@
 /* public domain rewrite of memcmp(3) */
 
+#include <stddef.h>
+
 void *
-memmove (d, s, n)
-    void *d, *s;
-    int n;
+memmove(void *d, const void *s, size_t n)
 {
-    char *dst = d;
-    char *src = s;
-    void *ret = dst;
+    char *dst = (char *)d;
+    const char *src = (const char *)s;
 
     if (src < dst) {
 	src += n;
 	dst += n;
-	while (n--)
+	for (; n; --n)
 	    *--dst = *--src;
     }
     else if (dst < src)
-	while (n--)
+	for (; n; --n)
 	    *dst++ = *src++;
-    return ret;
+    return d;
 }