diff --git a/modules/csync_owncloud.c b/modules/csync_owncloud.c
index 5f03e2fc2..9bffcebec 100644
--- a/modules/csync_owncloud.c
+++ b/modules/csync_owncloud.c
@@ -779,6 +779,15 @@ static csync_vio_method_handle_t *owncloud_open(const char *durl,
 	}
 #else
         writeCtx->tmpFileName = c_strdup( "/tmp/csync.XXXXXX" );
+#ifdef _WIN32
+	if( c_tmpname( writeCtx->tmpFileName ) == 0 ) {
+          _fmode = _O_BINARY;
+
+	   writeCtx->fd = open( writeCtx->tmpFileName, O_RDWR | O_CREAT | O_EXCL, 0600 );
+	} else {
+	   writeCtx->fd = -1;
+	}
+#else
         writeCtx->fd = mkstemp( writeCtx->tmpFileName );
 #endif
         DEBUG_WEBDAV(("opening temp directory %s\n", writeCtx->tmpFileName ));
@@ -873,6 +882,9 @@ static int owncloud_close(csync_vio_method_handle_t *fhandle) {
             }
 
             /* and open it again to read from */
+#ifdef _WIN32
+	    _fmode = _O_BINARY;
+#endif
             if (( writeCtx->fd = open( writeCtx->tmpFileName, O_RDONLY )) < 0) {
                 errno = EIO;
                 ret = -1;
@@ -939,6 +951,9 @@ static ssize_t owncloud_read(csync_vio_method_handle_t *fhandle, void *buf, size
 
     if( writeCtx->fd == -1 ) {
         /* open the downloaded file to read from */
+#ifdef _WIN32
+	_fmode = _O_BINARY;
+#endif
         if (( writeCtx->fd = open( writeCtx->tmpFileName, O_RDONLY )) < 0) {
             DEBUG_WEBDAV(("Could not open local file %s\n", writeCtx->tmpFileName ));
             errno = EIO;
diff --git a/src/csync_exclude.c b/src/csync_exclude.c
index 1aa45aa7d..3ffe93eb0 100644
--- a/src/csync_exclude.c
+++ b/src/csync_exclude.c
@@ -54,6 +54,9 @@ int csync_exclude_load(CSYNC *ctx, const char *fname) {
   char *buf = NULL;
   char *entry = NULL;
 
+#ifdef _WIN32
+  _fmode = _O_BINARY;  
+#endif
   fd = open(fname, O_RDONLY);
   if (fd < 0) {
     return -1;
diff --git a/src/csync_lock.c b/src/csync_lock.c
index 15a437f46..630652907 100644
--- a/src/csync_lock.c
+++ b/src/csync_lock.c
@@ -119,6 +119,9 @@ static pid_t _csync_lock_read(const char *lockfile) {
   int  fd, pid;
 
   /* Read PID from existing lock */
+#ifdef _WIN32
+   _fmode = _O_BINARY;
+#endif
   if ((fd = open(lockfile, O_RDONLY)) < 0) {
      return -1;
   }
diff --git a/src/csync_statedb.c b/src/csync_statedb.c
index ddcc3c220..963761a62 100644
--- a/src/csync_statedb.c
+++ b/src/csync_statedb.c
@@ -55,6 +55,9 @@ static int _csync_statedb_check(const char *statedb) {
   sqlite3 *db = NULL;
 
   /* check db version */
+#ifdef _WIN32
+   _fmode = _O_BINARY;
+#endif
   fd = open(statedb, O_RDONLY);
   if (fd >= 0) {
     if (read(fd, (void *) buf, (size_t) BUF_SIZE - 1) >= 0) {