diff --git a/src/simple-mtpfs-fuse.cpp b/src/simple-mtpfs-fuse.cpp
index 844ca76..f9b4d9a 100644
--- a/src/simple-mtpfs-fuse.cpp
+++ b/src/simple-mtpfs-fuse.cpp
@@ -559,7 +559,7 @@ int SMTPFileSystem::flush(const char *path, struct fuse_file_info *file_info)
 int SMTPFileSystem::fsync(const char *path, int datasync,
     struct fuse_file_info *fi)
 {
-    return 0;
+    return datasync ? ::fdatasync(fi->fh) : ::fsync(fi->fh);
 }
 
 int SMTPFileSystem::opendir(const char *path, struct fuse_file_info *file_info)