diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 3efc43f..efcbdfc 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1308,7 +1308,7 @@ static inline u32 jbd2_chksum(journal_t *journal, u32 crc,
 {
 	struct {
 		struct shash_desc shash;
-		char ctx[crypto_shash_descsize(journal->j_chksum_driver)];
+		char ctx[4];
 	} desc;
 	int err;