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-rw-r--r--sys/pci/simos.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/pci/simos.c b/sys/pci/simos.c
index 2a9a706..1afb432 100644
--- a/sys/pci/simos.c
+++ b/sys/pci/simos.c
@@ -26,6 +26,10 @@
* $FreeBSD$
*/
+#ifndef COMPAT_OLDPCI
+#error "The simos device requires the old pci compatibility shims"
+#endif
+
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
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