diff --git a/ChangeLog b/ChangeLog
index aeb5bdc..39cc5ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+nilfs2-kmod9-1.9  Sun Apr 23, 2023 JST
+
+	* backport another missing block initialization fix:
+	  - nilfs2: initialize unused bytes in segment summary blocks
+
 nilfs2-kmod9-1.8  Sun Apr 16, 2023 JST
 
 	* backport fixes for a potential use-after-free read issue and
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index ab63446..ad5c9f1 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -54,7 +54,7 @@ MODULE_AUTHOR("NTT Corp.");
 MODULE_DESCRIPTION("A New Implementation of the Log-structured Filesystem "
 		   "(NILFS)");
 MODULE_LICENSE("GPL");
-MODULE_VERSION("nilfs2-kmod9-1.8");
+MODULE_VERSION("nilfs2-kmod9-1.9");
 
 static struct kmem_cache *nilfs_inode_cachep;
 struct kmem_cache *nilfs_transaction_cachep;