diff --git a/fs/fat_fs.c b/fs/fat_fs.c
index a71e6b9bf46..414241e3b19 100644
--- a/fs/fat_fs.c
+++ b/fs/fat_fs.c
@@ -194,6 +194,15 @@ int fs_truncate(ZFILE *zfp, off_t length)
 	return translate_error(res);
 }
 
+int fs_sync(ZFILE *zfp)
+{
+	FRESULT res = FR_OK;
+
+	res = f_sync(&zfp->fp);
+
+	return translate_error(res);
+}
+
 int fs_mkdir(const char *path)
 {
 	FRESULT res;
diff --git a/include/fs.h b/include/fs.h
index 24a3d3ce43b..dc4679d280b 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -233,6 +233,22 @@ off_t fs_tell(ZFILE *zfp);
  */
 int fs_truncate(ZFILE *zfp, off_t length);
 
+/**
+ * @brief Flushes any cached write of an open file
+ *
+ * This function can be used to flush the cache of an open file. This can
+ * be called to ensure data gets written to the storage media immediately.
+ * This may be done to avoid data loss if power is removed unexpectedly.
+ * Note that closing a file will cause caches to be flushed correctly so it
+ * need not be called if the file is being closed.
+ *
+ * @param zfp Pointer to the file object
+ *
+ * @retval 0 Success
+ * @retval -ERRNO errno code if error
+ */
+int fs_sync(ZFILE *zfp);
+
 /**
  * @brief Directory create
  *