diff --git a/sys/conf/options b/sys/conf/options
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -718,7 +718,7 @@
 
 # ISA support
 DEV_ISA			opt_isa.h
-ISAPNP			opt_isa.h
+ISAPNP			opt_dontuse.h
 
 # various 'device presence' options.
 DEV_BPF			opt_bpf.h