diff --git a/lib/libf2fs.c b/lib/libf2fs.c
index e4734ca..029204d 100644
--- a/lib/libf2fs.c
+++ b/lib/libf2fs.c
@@ -479,10 +479,10 @@ f2fs_hash_t f2fs_dentry_hash(int encoding, int casefolded,
 	unsigned char *buff;
 
 	if (len && casefolded) {
-		buff = malloc(sizeof(char) * PATH_MAX);
+		buff = malloc(sizeof(char) * F2FS_NAME_LEN);
 		if (!buff)
 			return -ENOMEM;
-		dlen = table->ops->casefold(table, name, len, buff, PATH_MAX);
+		dlen = table->ops->casefold(table, name, len, buff, F2FS_NAME_LEN);
 		if (dlen < 0) {
 			free(buff);
 			goto opaque_seq;