--- sys/conf/options.i386	Mon Jul  2 23:02:46 2001
+++ sys/conf/options.i386	Mon Jul  2 23:03:09 2001
@@ -98,6 +98,7 @@
 PSM_HOOKRESUME		opt_psm.h
 PSM_RESETAFTERSUSPEND	opt_psm.h
 PSM_DEBUG		opt_psm.h
+PSM_DISABLE_4D_MOUSE	opt_psm.h
 
 PCIC_RESUME_RESET	opt_pcic.h
 
--- sys/isa/psm.c	Mon Jul  2 22:55:34 2001
+++ sys/isa/psm.c	Mon Jul  2 23:22:14 2001
@@ -279,10 +279,12 @@
       0x08, MOUSE_PS2_PACKETSIZE, enable_mmanplus, },
     { MOUSE_MODEL_EXPLORER,		/* Microsoft IntelliMouse Explorer */
       0x08, MOUSE_PS2INTELLI_PACKETSIZE, enable_msexplorer, },
+#ifndef PSM_DISABLE_4D_MOUSE
     { MOUSE_MODEL_4D,			/* A4 Tech 4D Mouse */
       0x08, MOUSE_4D_PACKETSIZE, enable_4dmouse, },
     { MOUSE_MODEL_4DPLUS,		/* A4 Tech 4D+ Mouse */
       0xc8, MOUSE_4DPLUS_PACKETSIZE, enable_4dplus, },
+#endif
     { MOUSE_MODEL_INTELLI,		/* Microsoft IntelliMouse */
       0x08, MOUSE_PS2INTELLI_PACKETSIZE, enable_msintelli, },
     { MOUSE_MODEL_GLIDEPOINT,		/* ALPS GlidePoint */