diff --git a/sys/pc98/conf/GENERIC b/sys/pc98/conf/GENERIC
index f2b2b1d8d4c8..479a79a7198e 100644
--- a/sys/pc98/conf/GENERIC
+++ b/sys/pc98/conf/GENERIC
@@ -66,6 +66,7 @@ options 	DDB			#Enable the kernel debugger
 options 	INVARIANTS		#Enable calls of extra sanity checking
 options 	INVARIANT_SUPPORT	#Extra sanity checks of internal structures, required by INVARIANTS
 options 	WITNESS			#Enable mutex checks to detects deadlocks and cycles
+options		WITNESS_SKIPSPIN	#Don't run witness on spinlocks for speed
 
 # To make an SMP kernel, the next two are needed
 #options 	SMP			# Symmetric MultiProcessor Kernel