1 files changed, 7 insertions, 2 deletions
diff --git a/mysys/my_seek.c b/mysys/my_seek.c
index e5b1905e551..239136c4e7c 100644
--- a/mysys/my_seek.c
+++ b/mysys/my_seek.c
@@ -29,8 +29,13 @@ my_off_t my_seek(File fd, my_off_t pos, int whence,
 		   whence, MyFlags));
   DBUG_ASSERT(pos != MY_FILEPOS_ERROR);		/* safety check */
 
-  if (-1 != fd)
-    newpos=lseek(fd, pos, whence);
+  /*
+      Make sure we are using a valid file descriptor!
+  */
+  DBUG_ASSERT(fd != -1);
+
+  newpos= lseek(fd, pos, whence);
+  
   if (newpos == (os_off_t) -1)
   {
     my_errno=errno;