diff --git a/Documentation/Developers/CHANGELOG-RENE b/Documentation/Developers/CHANGELOG-RENE
index 07fb86d83..aa22c3536 100644
--- a/Documentation/Developers/CHANGELOG-RENE
+++ b/Documentation/Developers/CHANGELOG-RENE
@@ -20,6 +20,7 @@
  - updated pbbuttons and xemacs
  - Mathieu: updated bittorrent (3.3)
  - fixed emacs for powerpc (and removed already disabled patch)
+ - disabled MMIO for SYM53C8XX on sparc: it does crash reproduceable on my U5
 
 *) 2003-09-24 (2.0.0-rc1 - 2.0.0-rc2)
 
diff --git a/architecture/sparc/kernel.conf.m4 b/architecture/sparc/kernel.conf.m4
index a47f71249..0b346bcbb 100644
--- a/architecture/sparc/kernel.conf.m4
+++ b/architecture/sparc/kernel.conf.m4
@@ -21,3 +21,8 @@ include(`kernel-scsi.conf')
 include(`kernel-net.conf')
 include(`kernel-fs.conf')
 
+dnl LSI Logic / Symbios Logic (formerly NCR) 53c810 (rev 01)
+dnl does not work reliable with MMIO on my Ultra SPARC 5
+dnl Rene Rebe <rene@rocklinux.org>
+# CONFIG_SCSI_SYM53C8XX_IOMAPPED is not set
+