diff --git a/sys/modules/zfs/Makefile b/sys/modules/zfs/Makefile
index b2967c174231..dcae59156252 100644
--- a/sys/modules/zfs/Makefile
+++ b/sys/modules/zfs/Makefile
@@ -528,6 +528,6 @@ zfs-sha512-x86_64.o: sha512-x86_64.S
 	${CTFCONVERT_CMD}
 .endif
 
-.if ${MACHINE_ARCH} == "aarch64c" || ${MACHINE_ARCH} == "riscv64c"
+.if ${MACHINE_ABI:Mpurecap}
 CFLAGS+=-Xclang -cheri-bounds=conservative
 .endif