diff --git a/libavutil/Makefile b/libavutil/Makefile
index 910f6f0382..9381c77dce 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -70,6 +70,7 @@ OBJS = adler32.o                                                        \
        eval.o                                                           \
        fifo.o                                                           \
        file.o                                                           \
+       file_open.o                                                      \
        float_dsp.o                                                      \
        frame.o                                                          \
        hmac.o                                                           \
diff --git a/libavutil/file.c b/libavutil/file.c
index cf76a8ac82..d2765b8490 100644
--- a/libavutil/file.c
+++ b/libavutil/file.c
@@ -21,7 +21,6 @@
 #include "internal.h"
 #include "log.h"
 #include "mem.h"
-#include <stdarg.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #if HAVE_UNISTD_H
@@ -36,69 +35,6 @@
 #include <windows.h>
 #endif
 
-#if defined(_WIN32) && !defined(__MINGW32CE__)
-#undef open
-#undef lseek
-#undef stat
-#undef fstat
-#include <windows.h>
-#include <share.h>
-#include <errno.h>
-
-static int win32_open(const char *filename_utf8, int oflag, int pmode)
-{
-    int fd;
-    int num_chars;
-    wchar_t *filename_w;
-
-    /* convert UTF-8 to wide chars */
-    num_chars = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename_utf8, -1, NULL, 0);
-    if (num_chars <= 0)
-        goto fallback;
-    filename_w = av_mallocz(sizeof(wchar_t) * num_chars);
-    if (!filename_w) {
-        errno = ENOMEM;
-        return -1;
-    }
-    MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, filename_w, num_chars);
-
-    fd = _wsopen(filename_w, oflag, SH_DENYNO, pmode);
-    av_freep(&filename_w);
-
-    if (fd != -1 || (oflag & O_CREAT))
-        return fd;
-
-fallback:
-    /* filename may be be in CP_ACP */
-    return _sopen(filename_utf8, oflag, SH_DENYNO, pmode);
-}
-#define open win32_open
-#endif
-
-int avpriv_open(const char *filename, int flags, ...)
-{
-    int fd;
-    unsigned int mode = 0;
-    va_list ap;
-
-    va_start(ap, flags);
-    if (flags & O_CREAT)
-        mode = va_arg(ap, unsigned int);
-    va_end(ap);
-
-#ifdef O_CLOEXEC
-    flags |= O_CLOEXEC;
-#endif
-
-    fd = open(filename, flags, mode);
-#if HAVE_FCNTL
-    if (fd != -1)
-        fcntl(fd, F_SETFD, FD_CLOEXEC);
-#endif
-
-    return fd;
-}
-
 typedef struct {
     const AVClass *class;
     int   log_offset;
diff --git a/libavutil/file_open.c b/libavutil/file_open.c
new file mode 100644
index 0000000000..765eb60ef3
--- /dev/null
+++ b/libavutil/file_open.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "internal.h"
+#include "mem.h"
+#include <stdarg.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_IO_H
+#include <io.h>
+#endif
+
+#if defined(_WIN32) && !defined(__MINGW32CE__)
+#undef open
+#undef lseek
+#undef stat
+#undef fstat
+#include <windows.h>
+#include <share.h>
+#include <errno.h>
+
+static int win32_open(const char *filename_utf8, int oflag, int pmode)
+{
+    int fd;
+    int num_chars;
+    wchar_t *filename_w;
+
+    /* convert UTF-8 to wide chars */
+    num_chars = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename_utf8, -1, NULL, 0);
+    if (num_chars <= 0)
+        goto fallback;
+    filename_w = av_mallocz(sizeof(wchar_t) * num_chars);
+    if (!filename_w) {
+        errno = ENOMEM;
+        return -1;
+    }
+    MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, filename_w, num_chars);
+
+    fd = _wsopen(filename_w, oflag, SH_DENYNO, pmode);
+    av_freep(&filename_w);
+
+    if (fd != -1 || (oflag & O_CREAT))
+        return fd;
+
+fallback:
+    /* filename may be be in CP_ACP */
+    return _sopen(filename_utf8, oflag, SH_DENYNO, pmode);
+}
+#define open win32_open
+#endif
+
+int avpriv_open(const char *filename, int flags, ...)
+{
+    int fd;
+    unsigned int mode = 0;
+    va_list ap;
+
+    va_start(ap, flags);
+    if (flags & O_CREAT)
+        mode = va_arg(ap, unsigned int);
+    va_end(ap);
+
+#ifdef O_CLOEXEC
+    flags |= O_CLOEXEC;
+#endif
+
+    fd = open(filename, flags, mode);
+#if HAVE_FCNTL
+    if (fd != -1)
+        fcntl(fd, F_SETFD, FD_CLOEXEC);
+#endif
+
+    return fd;
+}