diff --git a/board/czechlight/clearfog/linux.fragment b/board/czechlight/clearfog/linux.fragment
index 53b7232..72bec69 100644
--- a/board/czechlight/clearfog/linux.fragment
+++ b/board/czechlight/clearfog/linux.fragment
@@ -49,4 +49,8 @@
 CONFIG_NR_CPUS=2
 CONFIG_MV643XX_ETH=n
 
+# "Select this if you are building a kernel for a desktop or embedded system
+# with latency requirements in the milliseconds range." -- yes, we are.
+CONFIG_PREEMPT=y
+
 CONFIG_LOCALVERSION="-10-g683b4dee50cd"