1 files changed, 8 insertions, 1 deletions
diff --git a/libio/ftello.c b/libio/ftello.c
index dcecf5ee50..94a2541b25 100644
--- a/libio/ftello.c
+++ b/libio/ftello.c
@@ -35,7 +35,7 @@ off_t
 ftello (fp)
      _IO_FILE *fp;
 {
-  _IO_off_t pos;
+  _IO_off64_t pos;
   CHECK_FILE (fp, -1L);
   _IO_cleanup_region_start ((void (*) (void *)) _IO_funlockfile, fp);
   _IO_flockfile (fp);
@@ -55,5 +55,12 @@ ftello (fp)
 #endif
       return -1L;
     }
+  if ((_IO_off64_t) (off_t) pos != pos)
+    {
+#ifdef EOVERFLOW
+      __set_errno (EOVERFLOW);
+#endif
+      return -1L;
+    }
   return pos;
 }