diff --git a/fastboot/engine.c b/fastboot/engine.c
index 8d46991..b07e742 100644
--- a/fastboot/engine.c
+++ b/fastboot/engine.c
@@ -286,21 +286,7 @@
     int fd;
     struct stat st;
 
-#ifdef USE_MINGW
-    /* Ideally we should use tmpfile() here, the same as with unix version.
-     * But unfortunately it is not portable as it is not clear whether this
-     * function opens file in TEXT or BINARY mode.
-     *
-     * There are also some reports it is buggy:
-     *    http://pdplab.it.uom.gr/teaching/gcc_manuals/gnulib.html#tmpfile
-     *    http://www.mega-nerd.com/erikd/Blog/Windiots/tmpfile.html
-     */
-    char *filename = tempnam(getenv("TEMP"), "fastboot-format.img");
-    fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0644);
-    unlink(filename);
-#else
     fd = fileno(tmpfile());
-#endif
     make_ext4fs_sparse_fd(fd, image->partition_size, NULL, NULL);
 
     fstat(fd, &st);
diff --git a/fastboot/fastboot.c b/fastboot/fastboot.c
index 447b257..e469d97 100644
--- a/fastboot/fastboot.c
+++ b/fastboot/fastboot.c
@@ -135,21 +135,17 @@
     return strdup(path);
 }
 
-#ifdef _WIN32
-void *load_file(const char *fn, unsigned *_sz);
-int64_t file_size(const char *fn);
-#else
 #if defined(__APPLE__) && defined(__MACH__)
 #define lseek64 lseek
 #define off64_t off_t
 #endif
 
-int64_t file_size(const char *fn)
+static int64_t file_size(const char *fn)
 {
     off64_t off;
     int fd;
 
-    fd = open(fn, O_RDONLY);
+    fd = open(fn, O_RDONLY | O_BINARY);
     if (fd < 0) return -1;
 
     off = lseek64(fd, 0, SEEK_END);
@@ -158,7 +154,7 @@
     return off;
 }
 
-void *load_file(const char *fn, unsigned *_sz)
+static void *load_file(const char *fn, unsigned *_sz)
 {
     char *data;
     int sz;
@@ -166,7 +162,7 @@
     int errno_tmp;
 
     data = 0;
-    fd = open(fn, O_RDONLY);
+    fd = open(fn, O_RDONLY | O_BINARY);
     if(fd < 0) return 0;
 
     sz = lseek(fd, 0, SEEK_END);
@@ -190,7 +186,6 @@
     errno = errno_tmp;
     return 0;
 }
-#endif
 
 int match_fastboot_with_serial(usb_ifc_info *info, const char *local_serial)
 {
diff --git a/fastboot/util_windows.c b/fastboot/util_windows.c
index 9e029fd..74a5c27 100644
--- a/fastboot/util_windows.c
+++ b/fastboot/util_windows.c
@@ -36,29 +36,6 @@
 
 #include <windows.h>
 
-int64_t file_size(const char *fn)
-{
-    HANDLE    file;
-    char     *data;
-    DWORD     sz;
-
-    file = CreateFile( fn,
-                       GENERIC_READ,
-                       FILE_SHARE_READ,
-                       NULL,
-                       OPEN_EXISTING,
-                       0,
-                       NULL );
-
-    if (file == INVALID_HANDLE_VALUE)
-        return -1;
-
-    sz = GetFileSize( file, NULL );
-    CloseHandle( file );
-
-    return sz;
-}
-
 void get_my_path(char exe[PATH_MAX])
 {
 	char*  r;
@@ -70,47 +47,3 @@
 		*r = 0;
 }
 
-
-void *load_file(const char *fn, unsigned *_sz)
-{
-    HANDLE    file;
-    char     *data;
-    DWORD     sz;
-
-    file = CreateFile( fn,
-                       GENERIC_READ,
-                       FILE_SHARE_READ,
-                       NULL,
-                       OPEN_EXISTING,
-                       0,
-                       NULL );
-
-    if (file == INVALID_HANDLE_VALUE)
-        return NULL;
-
-    sz = GetFileSize( file, NULL );
-    data      = NULL;
-
-    if (sz > 0) {
-        data = (char*) malloc( sz );
-        if (data == NULL) {
-            fprintf(stderr, "load_file: could not allocate %ld bytes\n", sz );
-            sz = 0;
-        } else {
-            DWORD  out_bytes;
-
-            if ( !ReadFile( file, data, sz, &out_bytes, NULL ) ||
-                 out_bytes != sz )
-            {
-                fprintf(stderr, "load_file: could not read %ld bytes from '%s'\n", sz, fn);
-                free(data);
-                data      = NULL;
-                sz = 0;
-            }
-        }
-    }
-    CloseHandle( file );
-
-    *_sz = (unsigned) sz;
-    return  data;
-}