diff --git a/RISCOS/unixstuff.h b/RISCOS/unixstuff.h
index 75104c2..90c732b1 100644
--- a/RISCOS/unixstuff.h
+++ b/RISCOS/unixstuff.h
@@ -1,13 +1,14 @@
 /* Fudge unix isatty and fileno for RISCOS */
 
 #include <stdio.h>
+#include <time.h>
 
 int fileno(FILE *f);
 int isatty(int fn);
 unsigned int unixtime(unsigned int ld,unsigned int ex);
-/*long PyOS_GetLastModificationTime(char *name);*/
-int unlink(char *fname);
+int acorntime(unsigned int *ex, unsigned int *ld, time_t ut);
+
 int isdir(char *fn);
 int isfile(char *fn);
-int exists(char *fn);
+int object_exists(char *fn);