diff --git a/libntfs/inode.c b/libntfs/inode.c
index 1da2d8e4..a03bee55 100644
--- a/libntfs/inode.c
+++ b/libntfs/inode.c
@@ -411,7 +411,7 @@ int ntfs_inode_attach_all_extents(ntfs_inode *ni)
  *
  * Return 0 on success or -1 on error with errno set to the error code.
  */
-int ntfs_inode_sync_standard_information(ntfs_inode *ni) {
+static int ntfs_inode_sync_standard_information(ntfs_inode *ni) {
 	ntfs_attr_search_ctx *ctx;
 	STANDARD_INFORMATION *std_info;
 	int err;