diff --git a/sys/amd64/conf/NOTES b/sys/amd64/conf/NOTES
index c6a538de830..eb4234510f3 100644
--- a/sys/amd64/conf/NOTES
+++ b/sys/amd64/conf/NOTES
@@ -612,9 +612,6 @@ options 	EFIRT
 # Enable 32-bit runtime support for FreeBSD/i386 binaries.
 options 	COMPAT_FREEBSD32
 
-# Emulate spx device for client side of SVR3 local X interface
-#XXX#options 	SPX_HACK
-
 # Enable (32-bit) a.out binary support
 options 	COMPAT_AOUT
 
diff --git a/sys/conf/options b/sys/conf/options
index 235226e8fdd..a602ff5b05a 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -201,7 +201,6 @@ SCHED_STATS	opt_sched.h
 SCHED_ULE	opt_sched.h
 SLEEPQUEUE_PROFILING
 SLHCI_DEBUG	opt_slhci.h
-SPX_HACK
 STACK		opt_stack.h
 SUIDDIR
 MSGMNB		opt_sysvipc.h
diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES
index 8ae4d95d45f..a1fc6eb310b 100644
--- a/sys/i386/conf/NOTES
+++ b/sys/i386/conf/NOTES
@@ -885,9 +885,6 @@ options 	NKPT=31
 #####################################################################
 # ABI Emulation
 
-# Emulate spx device for client side of SVR3 local X interface
-options 	SPX_HACK
-
 # Enable (32-bit) a.out binary support
 options 	COMPAT_AOUT