diff --git a/configure b/configure
index 365df4e4a56..273d70a31e9 100755
--- a/configure
+++ b/configure
@@ -16747,7 +16747,6 @@ for ac_func in \
 	getuid \
 	kqueue \
 	lstat \
-	memmove \
 	mmap \
 	pclose \
 	pipe2 \
diff --git a/configure.ac b/configure.ac
index 5c9980b4401..f3e8d656543 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2165,7 +2165,6 @@ AC_CHECK_FUNCS(\
 	getuid \
 	kqueue \
 	lstat \
-	memmove \
 	mmap \
 	pclose \
 	pipe2 \
diff --git a/include/config.h.in b/include/config.h.in
index 7db97d36a08..476a3fbded4 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -600,9 +600,6 @@
 /* Define to 1 if you have the <mach-o/nlist.h> header file. */
 #undef HAVE_MACH_O_NLIST_H
 
-/* Define to 1 if you have the `memmove' function. */
-#undef HAVE_MEMMOVE
-
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
diff --git a/include/wine/port.h b/include/wine/port.h
index 600d78d9b4e..e3bfa7f684e 100644
--- a/include/wine/port.h
+++ b/include/wine/port.h
@@ -292,10 +292,6 @@ long lrintf(float x);
 int lstat(const char *file_name, struct stat *buf);
 #endif /* HAVE_LSTAT */
 
-#ifndef HAVE_MEMMOVE
-void *memmove(void *dest, const void *src, size_t len);
-#endif /* !defined(HAVE_MEMMOVE) */
-
 #ifndef HAVE_POLL
 struct pollfd
 {
@@ -523,8 +519,6 @@ extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compa
 #define interlocked_xchg_ptr    __WINE_NOT_PORTABLE(interlocked_xchg_ptr)
 #define interlocked_xchg_add    __WINE_NOT_PORTABLE(interlocked_xchg_add)
 #define lstat                   __WINE_NOT_PORTABLE(lstat)
-#undef memmove
-#define memmove                 __WINE_NOT_PORTABLE(memmove)
 #define pread                   __WINE_NOT_PORTABLE(pread)
 #define pwrite                  __WINE_NOT_PORTABLE(pwrite)
 #define spawnvp                 __WINE_NOT_PORTABLE(spawnvp)
diff --git a/libs/port/Makefile.in b/libs/port/Makefile.in
index b49cb78ec26..908b6b62e13 100644
--- a/libs/port/Makefile.in
+++ b/libs/port/Makefile.in
@@ -89,7 +89,6 @@ C_SRCS = \
 	isnan.c \
 	lstat.c \
 	mbtowc.c \
-	memmove.c \
 	mkstemps.c \
 	normalize.c \
 	poll.c \
diff --git a/libs/port/memmove.c b/libs/port/memmove.c
deleted file mode 100644
index 7be9638a782..00000000000
--- a/libs/port/memmove.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * memmove function
- *
- * Copyright 1996 Alexandre Julliard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "config.h"
-#include "wine/port.h"
-
-#ifndef HAVE_MEMMOVE
-void *memmove( void *dest, const void *source, size_t len )
-{
-    register char *dst = dest;
-    register const char *src = source;
-
-    /* Use memcpy if not overlapping */
-    if ((dst + len <= src) || (src + len <= dst))
-    {
-        memcpy( dst, src, len );
-    }
-    /* Otherwise do it the hard way (FIXME: could do better than this) */
-    else if (dst < src)
-    {
-        while (len--) *dst++ = *src++;
-    }
-    else
-    {
-        dst += len - 1;
-        src += len - 1;
-        while (len--) *dst-- = *src--;
-    }
-    return dest;
-}
-#endif  /* HAVE_MEMMOVE */