diff --git a/module/zfs/vdev_indirect_births.c b/module/zfs/vdev_indirect_births.c
index 99b83c3922..e8f925628d 100644
--- a/module/zfs/vdev_indirect_births.c
+++ b/module/zfs/vdev_indirect_births.c
@@ -38,6 +38,8 @@ vdev_indirect_births_verify(vdev_indirect_births_t *vib)
 
 	return (B_TRUE);
 }
+#else
+#define	vdev_indirect_births_verify(vib) ((void) sizeof (vib), B_TRUE)
 #endif
 
 uint64_t