diff --git a/tsk3/fs/tsk_ntfs.h b/tsk3/fs/tsk_ntfs.h
index b67b39b2ce58906d7d0628ae558515cc4451d643..0544524d3a8f4f7ee2b4677380c2c53398dd599e 100644
--- a/tsk3/fs/tsk_ntfs.h
+++ b/tsk3/fs/tsk_ntfs.h
@@ -704,7 +704,7 @@ extern "C" {
         ntfs_dir_open_meta(TSK_FS_INFO * a_fs, TSK_FS_DIR ** a_fs_dir,
         TSK_INUM_T a_addr);
 
-    extern void ntfs_oprhan_map_free(NTFS_INFO * a_ntfs);
+    extern void ntfs_orphan_map_free(NTFS_INFO * a_ntfs);
 #ifdef __cplusplus
 }
 #endif