diff --git a/config.seabios-128k b/config.seabios-128k
index 7e279e1..83a629e 100644
--- a/config.seabios-128k
+++ b/config.seabios-128k
@@ -19,4 +19,9 @@ CONFIG_USE_SMM=n
 CONFIG_VGAHOOKS=n
 CONFIG_HOST_BIOS_GEOMETRY=n
 CONFIG_ACPI_PARSE=n
+# Patch 0002 generates different rom sizes than qemu's
+# seabios build, so we need to disable additional bits
+# to fit under the rom size limit. For some reason this
+# doesn't affect RHEL8 builds, maybe gcc version factors
+# in too.
 CONFIG_SERCON=n