diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
index fbb0689f3c55..c50b5d2d794f 100644
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -69,6 +69,9 @@ options 	WITNESS_SKIPSPIN	#Don't run witness on spinlocks for speed
 #options 	SMP			# Symmetric MultiProcessor Kernel
 #options 	APIC_IO			# Symmetric (APIC) I/O
 
+# To support HyperThreading, HTT is needed in addition to SMP and APIC_IO
+#options 	HTT			# HyperThreading Technology
+
 device		isa
 device		eisa
 device		pci
diff --git a/sys/i386/conf/GENERIC b/sys/i386/conf/GENERIC
index fbb0689f3c55..c50b5d2d794f 100644
--- a/sys/i386/conf/GENERIC
+++ b/sys/i386/conf/GENERIC
@@ -69,6 +69,9 @@ options 	WITNESS_SKIPSPIN	#Don't run witness on spinlocks for speed
 #options 	SMP			# Symmetric MultiProcessor Kernel
 #options 	APIC_IO			# Symmetric (APIC) I/O
 
+# To support HyperThreading, HTT is needed in addition to SMP and APIC_IO
+#options 	HTT			# HyperThreading Technology
+
 device		isa
 device		eisa
 device		pci
diff --git a/sys/i386/conf/SMP b/sys/i386/conf/SMP
index bf555f157810..746ee473bc3f 100644
--- a/sys/i386/conf/SMP
+++ b/sys/i386/conf/SMP
@@ -10,3 +10,6 @@ ident		SMP-GENERIC
 # To make an SMP kernel, the next two are needed
 options 	SMP			# Symmetric MultiProcessor Kernel
 options 	APIC_IO			# Symmetric (APIC) I/O
+
+# To support HyperThreading, HTT is needed in addition to SMP and APIC_IO
+options 	HTT			# HyperThreading Technology