1 files changed, 1 insertions, 1 deletions
diff --git a/mysys/my_pread.c b/mysys/my_pread.c
index 093a5a7a40c..146e07773e6 100644
--- a/mysys/my_pread.c
+++ b/mysys/my_pread.c
@@ -75,7 +75,7 @@ size_t my_pread(File Filedes, uchar *Buffer, size_t Count, my_off_t offset,
     if ((error= ((readbytes= pread(Filedes, Buffer, Count, offset)) != Count)))
     {
 #endif
-      my_errno= errno;
+      my_errno= errno ? errno : -1;
       if (errno == 0 || (readbytes != (size_t) -1 &&
                          (MyFlags & (MY_NABP | MY_FNABP))))
         my_errno= HA_ERR_FILE_TOO_SHORT;