1 files changed, 5 insertions, 0 deletions
diff --git a/mysys/my_write.c b/mysys/my_write.c
index 64f7546620f..46b0d749944 100644
--- a/mysys/my_write.c
+++ b/mysys/my_write.c
@@ -36,6 +36,11 @@ size_t my_write(File Filedes, const uchar *Buffer, size_t Count, myf MyFlags)
   for (;;)
   {
 #ifdef _WIN32
+    if(Filedes < 0)
+    {
+      my_errno= errno= EBADF;
+      DBUG_RETURN((size_t)-1);
+    }
     writtenbytes= my_win_write(Filedes, Buffer, Count);
 #else
     writtenbytes= write(Filedes, Buffer, Count);