diff --git a/sys/compat/linuxkpi/common/include/asm/pgtable.h b/sys/compat/linuxkpi/common/include/asm/pgtable.h
--- a/sys/compat/linuxkpi/common/include/asm/pgtable.h
+++ b/sys/compat/linuxkpi/common/include/asm/pgtable.h
@@ -40,4 +40,6 @@
 typedef unsigned long	pgprotval_t;
 typedef struct page *pgtable_t;
 
+#define	pgprot_decrypted(prot)	(prot)
+
 #endif	/* _ASM_PGTABLE_H_ */