diff --git a/sim_fio.c b/sim_fio.c
index c86d67b..e30a533 100644
--- a/sim_fio.c
+++ b/sim_fio.c
@@ -183,7 +183,7 @@ FILE *sim_fopen (const char *file, const char *mode)
 return fopen (file, mode, "ALQ=32", "DEQ=4096",
         "MBF=6", "MBC=127", "FOP=cbt,tef", "ROP=rah,wbh", "CTX=stm");
 #elif (defined (__linux) || defined (__linux__) || defined (__hpux) || defined (_AIX)) && !defined (DONT_DO_LARGEFILE)
-return fopen64 (file, mode);
+return fopen (file, mode);
 #else
 return fopen (file, mode);
 #endif
@@ -268,12 +268,12 @@ return (t_offset) _ftelli64 (st);
 
 int sim_fseeko (FILE *st, t_offset xpos, int origin)
 {
-return fseeko64 (st, (off64_t)xpos, origin);
+return fseeko (st, (off_t)xpos, origin);
 }
 
 t_offset sim_ftell (FILE *st)
 {
-return (t_offset)(ftello64 (st));
+return (t_offset)(ftello (st));
 }
 
 #endif                                                  /* end Linux with LFS */