diff --git a/include/ntfs-3g/unistr.h b/include/ntfs-3g/unistr.h
index 63f57588..639c5033 100644
--- a/include/ntfs-3g/unistr.h
+++ b/include/ntfs-3g/unistr.h
@@ -53,11 +53,6 @@ extern void ntfs_name_locase(ntfschar *name, u32 name_len,
 extern void ntfs_file_value_upcase(FILE_NAME_ATTR *file_name_attr,
 		const ntfschar *upcase, const u32 upcase_len);
 
-extern int ntfs_file_values_compare(const FILE_NAME_ATTR *file_name_attr1,
-		const FILE_NAME_ATTR *file_name_attr2,
-		const int err_val, const IGNORE_CASE_BOOL ic,
-		const ntfschar *upcase, const u32 upcase_len);
-
 extern int ntfs_ucstombs(const ntfschar *ins, const int ins_len, char **outs,
 		int outs_len);
 extern int ntfs_mbstoucs(const char *ins, ntfschar **outs);