diff --git a/fs/hfs/bfind.c b/fs/hfs/bfind.c
index ddabd9996575..48ff88b01262 100644
--- a/fs/hfs/bfind.c
+++ b/fs/hfs/bfind.c
@@ -23,7 +23,7 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd)
 		return -ENOMEM;
 	fd->search_key = ptr;
 	fd->key = ptr + tree->max_key_len + 2;
-	memset(fd->key, 0, sizeof(struct hfs_key));
+	memset(fd->key, 0, tree->max_key_len);
 	hfs_dbg(BNODE_REFS, "find_init: %d (%p)\n",
 		tree->cnid, __builtin_return_address(0));
 	switch (tree->cnid) {