diff --git a/sys/sparc64/conf/GENERIC b/sys/sparc64/conf/GENERIC
index f2a3a46623d..b325783b08a 100644
--- a/sys/sparc64/conf/GENERIC
+++ b/sys/sparc64/conf/GENERIC
@@ -34,7 +34,7 @@ makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
 
 #options 	SCHED_ULE		# ULE scheduler
 options 	SCHED_4BSD		# 4BSD scheduler
-options 	PREEMPTION		# Enable kernel thread preemption
+#options 	PREEMPTION		# Enable kernel thread preemption
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols
 options 	FFS			# Berkeley Fast Filesystem