diff --git a/include/os/freebsd/spl/sys/isa_defs.h b/include/os/freebsd/spl/sys/isa_defs.h
index a9d1a4e1f..e300259d8 100644
--- a/include/os/freebsd/spl/sys/isa_defs.h
+++ b/include/os/freebsd/spl/sys/isa_defs.h
@@ -542,6 +542,22 @@ extern "C" {
 #define	_BIT_FIELDS_LTOH
 #endif
 
+#if !defined(__powerpc)
+#define __powerpc
+#endif
+
+#if defined(__powerpc64__)
+#define	_LONG_LONG_ALIGNMENT		8
+#define	_MULTI_DATAMODEL
+#else
+#define	_LONG_LONG_ALIGNMENT		4
+#endif
+#define	_LONG_LONG_ALIGNMENT_32		4
+#define	_ALIGNMENT_REQUIRED		1
+
+#define	_SUNOS_VTOC_16	1
+
+
 /*
  * The following set of definitions characterize the Solaris on SPARC systems.
  *
diff --git a/lib/libspl/include/sys/types.h b/lib/libspl/include/sys/types.h
index ea02ffac9..274e4ec82 100644
--- a/lib/libspl/include/sys/types.h
+++ b/lib/libspl/include/sys/types.h
@@ -24,6 +24,8 @@
  * Use is subject to license terms.
  */
 
+#error "Hey, use the other one!"
+
 #ifndef _LIBSPL_SYS_TYPES_H
 #define	_LIBSPL_SYS_TYPES_H
 
diff --git a/module/zfs/vdev_raidz_math.c b/module/zfs/vdev_raidz_math.c
index acaa32f6d..aa92cb83d 100644
--- a/module/zfs/vdev_raidz_math.c
+++ b/module/zfs/vdev_raidz_math.c
@@ -65,7 +65,7 @@ const raidz_impl_ops_t *raidz_all_maths[] = {
 	&vdev_raidz_aarch64_neon_impl,
 	&vdev_raidz_aarch64_neonx2_impl,
 #endif
-#if defined(__powerpc__)
+#if defined(__powerpc__) && defined(__altivec__)
 	&vdev_raidz_powerpc_altivec_impl,
 #endif
 };