diff --git a/sys/sparc64/conf/GENERIC b/sys/sparc64/conf/GENERIC
index 1601ad7afd47..7d9bef8ccc0f 100644
--- a/sys/sparc64/conf/GENERIC
+++ b/sys/sparc64/conf/GENERIC
@@ -27,7 +27,7 @@ makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
 #	At this time all platforms are supported, as-is.
 
 options 	SCHED_ULE		# ULE scheduler
-#options 	PREEMPTION		# Enable kernel thread preemption
+options 	PREEMPTION		# Enable kernel thread preemption
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols
 options 	SCTP			# Stream Control Transmission Protocol